Take the 2-minute tour ×
User Experience Stack Exchange is a question and answer site for user experience researchers and experts. It's 100% free, no registration required.

I have a quick question about buttons that toggle between two states. (Think Play/Pause, or Shuffle/Regular Play.) As the title says, should the toggle show it's current state or the state to which it will transition?

I think people are used to the Play/Pause convention. But the Shuffle/Regular play might be more confusing if you show the transition state instead of current. For example, the built in music player on the XBox 360 does it this way: when it's in shuffle mode, it shows the icon for direct play and vice versa and it always confuses me (am I in shuffle mode or straight play).

It see it this way. Play/Pause is more like an action as in begin playing or pause playing. Yes behind the scenes it is a state transition but to the user there is an action. Whereas Shuffle/Straight Play is an option and it's best to show the current state (and possibly have only one icon and change button to show that the option is enabled/disabled). Thoughts?

share|improve this question
2  
What about using a checkbox, especially if the selection between the two options can be summarized in a yes/no question? –  vsz Feb 21 '13 at 22:44
    
long time ago, but - I'd stay away from these categories (action vs. option). I'm surprised at how often I think these are clear, and "my" users have never thought about them, much less a clear distinction. –  virtualnobi Dec 12 '13 at 12:20
    
Only a comment but I put the text Mode: in front of all toggle buttons and make them a different color. It is less space than radio buttons. I use it when the toggle needs to be in a certain orders –  Blam yesterday

17 Answers 17

up vote 123 down vote accepted

In About Face 2.0 (there is a v3 but I haven't got it) Cooper and Reimann (2003, pp. 341-2) treat this subject under the heading "Flip-flop buttons: A selection idiom to avoid". I strongly suggest to consult this book as I will only present an excerpt:

Flip-flop button controls are very efficient. They save space by controlling two mutually exclusive options with a single control. The problem with flip-flop controls is that they fail to fulfill the second duty of every control - to inform the user of their current state. If the button says ON when the state is off, it is unclear what the setting is. If it is OFF when the state is off, however, where is the ON button? Don't use them. Not on buttons and no on menus!

The authors (and I think of these as an authority on the subject) presents two possible solutions: You should either spell the button's action out as a verb phrase (e.g., Switch to portrait mode, thereby sacrificing some of the saved space) or use some other technique entirely (e.g., two radio buttons).

share|improve this answer
2  
+1 - This is what my answer would have been. –  Rahul Sep 6 '10 at 15:57
5  
It's page 445 of About Face 3. –  Patrick McElhaney Sep 7 '10 at 12:50
1  
"Switch to Portrait Mode" as tooltip with "Portrait Mode" as button text would help user. If I don't understand the button text, the very next step will be to look for Tooltip –  Tech Jerk May 11 '11 at 7:12
45  
We have an industrial control process with flip-flop buttons everywhere. Whenever things are running, they are RED to indicate that it will stop if you push the button. If it's stopped, they are GREEN. It's the most confusing UI I've ever seen. A screen full of red means everything is running smoothly! o_O –  Andy S Oct 25 '11 at 18:28
6  
@AndyS: Nope, a screen full of red means "Don't you f*ing touch anything here!" :D –  SNag Jun 15 '13 at 15:59

Short Answer:

Quite a late answer, but I'm surprised no one here pointed this out before -- it is possible for a toggle switch to show its current state and the state to which it will change simply by having text outside the button, instead of on it.

Real Life Switches

Long Answer:

As dotancohen points out above,

The problem is that in English "on" and "off" are both verbs and adjectives.

Buttons that have text outside of their body use this very fact to their advantage! Read on...


Take the iOS switch design:

iOS On-Off Switch

Let's focus on the state that's blue and says ON for example.

iOS ON

Can you tell if the switch is ON currently, or if it will go on if you move/click/tap the slider? Is the text obvious? Is "ON" here a state(adjective) or action(verb)? Unclear. Is the color of any use to help you decide this? Probably, but not certainly -- iOS users may be habituated to the states of this design, but there's no telling how non-iOS users would interpret this. To see what I mean, take this real life trip-switch, which has the same design as the iOS switch -- can you tell for sure if the trip switch is currently ON?

Ambiguous Trip Switch

The switch below is along the lines of the iOS design, but far worse...

Ambiguous On-Off Switch

...it's not even clear which half the slide/click handle is!


On the other hand, the OS X switch design leaves no room for ambiguity:

Unambiguous On-Off Switch

The question from jensgram's quote...

If the button says ON when the state is off, it is unclear what the setting is. If it is OFF when the state is off, however, where is the ON button?

...never arises here since the button neither says ON nor OFF -- it just stands by itself. Also, there's no confusion about the context of the words ON and OFF -- they are very clearly states (adjectives) since clicking on them (in the normal design) would do nothing!

It may be interesting to note that a modification to this design would allow for the text on the far side of the button to be made click-able/tap-able. If so, the word closer to the switch-handle is the state, while other one is the action, and the roles are reversed when the switch is toggled.

Modded On-Off Switch

Even so, the user's perspective of the switch isn't altered -- at no point is the user confused about the current state of the switch. In fact, the design could be further enhanced for user friendliness by highlighting the current state:

Highlighted On-Off Switch


The Windows Metro UI design for the switch goes a step further, and removes the "action" text from the button, and retains just the "state" text:

Win8 On-Off Switch

The color of the button indicates the current state (lit up = ON, as in real life), and the words On/Off underneath the option text reassure the user of the current state.

share|improve this answer
4  
Nice answer especially considering the time lapse! –  Mike Brown Jun 17 '13 at 22:07
1  
+1 for the simple fact of labeling outside the switch. –  uxfelix Dec 19 '13 at 9:50
    
Good point about having the text outside. Just want to point out that it's not about on/off being verbs. On/off are certainly not verbs (guess they could be adverbs - "to turn OFF/ON"). It's about the perception of buttons doing things when you click on them. And as the text on buttons usually say the action to perform and not the opposite of the state you want to go to, it can be hard to tell what the button actually does. –  Jonathan Azulay Feb 27 at 0:56
1  
Excellent point. Surprising to see OS X get it right while iOS is a bit ambiguous. –  Tbolt Jun 26 at 13:34
    
@SNag Great answer! I liked your trip switch example! –  sudarsanyes Aug 1 at 6:07

I think you've got it pretty much right in your question.

If the toggle is an action - Play/Pause - then it should show the thing that will happen. So while paused it would show Play and then while playing show Pause.

If the toggle is an option - Shuffle/Linear - then it should show the current state.

How you indicate that to the user that one button is an action and the other is an option I'm not sure...

share|improve this answer
1  
Perhaps buttons that perform an action and have their behavior toggled when clicked should not really be considered Toggle Buttons but instead just regular buttons that have their behavior dependent on the action that is currently being performed. –  jpierson Feb 7 '11 at 17:42
    
This is the perfect answer to my similar question. –  Chase Florell Mar 17 at 17:01

I'm surprised to see no mention of the technique used in iOS (and elsewhere), a combined action/state button, where both options are visible, grouped and the active one is clearly highlighted.

Terrible ascii art to demonstrate:

[ ON | off ]

Airplane mode toggle on iOS

share|improve this answer
30  
I believe that iOS switch is a total failure. Look at the image on the image provided in the comment above and try to answer the fundamental question. What is the current state?! –  Denzo May 23 '11 at 8:19
9  
And when it is on it is a blue "On" on the left side. This is the opposite of a total failure. It is briliiant. –  Matt Rockwell May 24 '11 at 17:59
21  
I find that utterly incomprehensible. If it's off "because OFF is the only thing visible," then do I turn it on by clicking the OFF button or the empty space to the left of it? –  Adrian McCarthy Aug 1 '11 at 23:04
7  
@Adrian: Exactly what jensgram said: "If it is OFF when the state is off, however, where is the ON button?" I think jezmck was right in the original post: Show both states, and highlight the active one. –  l0b0 Nov 17 '11 at 15:24
6  
@l0b0: With only two choices, it's very difficult to show two options and highlight one in an unambiguous way. Is it highlighting off because the state is off because the only thing I can do is turn it off? I look at the Airplane Mode graphic above and keep thinking it's on because OFF looks like a button, and buttons should be labeled with the action they perform. –  Adrian McCarthy Nov 17 '11 at 22:16

I would say that it depends on the case, as ChrisF said, it's important to have a distinction between an action button and a state button.

If your button has text, you could change the text to show that clicking it will do something (ex: "Turn shuffle play on"). However, in your case, since it's only an icon, I would go with only a shuffle icon that looks enabled/disabled depending on the state. If it's disabled, then it should be clear to the user that it's straight play. You could light it up or show the button as pressed down.

Consider adding a tooltip on hover to make it even more clear.

share|improve this answer

I'd stop just short of "don't use them."

I'd suggest toggle buttons are acceptable in the case where there is a clear on and off state. This can occur, for instance, when you have a line of grayed buttons that become colored when you click them.

This is the reason Play/Pause works in many cases. The play button is not so much a toggle between two states as an enable/disable. It turns bright green when on (I'm playing!), it turns gray and shows a || when off (I'm not playing!).

The other buttons do the same, so the consistency adds to the affordance. It's probably also based on our historical perceptions of a tape deck or VCR, which had buttons you pressed in (i.e. on state) or depressed (i.e. off state) and I think this is a great mental model to keep in mind when considering a toggle.

But in any case where they are not simply "activated", where you couldn't replace the toggle with an uglier checkbox, I'd default to "don't use them," for all the reasons already mentioned.

ADDITION

I just noticed today that Evernote has a pretty effective toggle. They took the approach of a mouseover, which actually worked pretty well. Note that this is another case of an on/off style control.

toggled off

toggled on

ADDITIONAL ADDITION

I found this interesting switch today and was reminded of this UX Q&A. Note how the state is immediately obvious, and the fact that it's going to switch when you touch it is also made obvious by the textured "handle" (i.e. affordance)--I just know that when I grab that raised knob, it will switch to the opposite side and say the opposite of what it says now; it's just like an airplane lavatory.

So they can be done well.

toggled off toggled on

share|improve this answer
    
Looking at your right "lavatory" button, I tend to move it to the left to switch it "on". –  maaartinus 2 days ago

Whatever you decide - please don't do what twitter does.

Aargh don't change the button when I'm about to click it!

share|improve this answer
2  
I don't think it's a bad example, the effect on mouseover gives enough information to understand how it works. But it may still be confusing on a touch screen, without mouse hover. –  A.L Feb 21 at 11:27
2  
@n.1 Typically you wouldn't mouse over and stop if there was a change of state, you would go in and click with one intention and all of a sudden the button flips on you hoping you will pause long enough to recognize the change. Mostly this results in accidental clicking more often than not. –  Sammy Guergachi May 11 at 1:39
    
+1 for the very shy mouse that seems apprehensive about clicking the button. –  Lego Stormtroopr Aug 29 at 5:26

The problem is that in English "on" and "off" are both verbs and adjectives. Therefore, find replacement words that are either verbs or adjectives to label the buttons with:

Enable / Disable
Enabled / Disabled
Start / Stop
Running / Stopped

Very late edit: See this terrific switch that a coworker of mine designed, which succeeds in keeping the "on/off" terminology yet does so unambiguously:

on off switch

share|improve this answer
1  
It doesn't answer the subject when you have switch button to toggle SIMPLE VIEW/ADVANCED VIEW where the simple view is the full table of contents (tree view) and advanced view is the table of contents with only nodes which are opened. –  pierre lebailly Jun 11 '13 at 5:55
    
"On" and "off" are certainly not verbs, though I suppose they might be interpreted as abbreviations for phrases like "switch on". In any case, the distinction between labelling a control "enable" or "enabled" is too subtle to make for a clear, usable interface. –  Bennett McElwee Dec 18 '13 at 21:54

In many cases it might be useful or possible to avoid such buttons.

E.g. in the case of shuffled/regular play: just use a checkbox with a "shuffle" label next to it, and nobody will get confused...

And in the case of a play/shuffle button, it's maybe not necessary to change the label on the button either. You could use a "pressed" button to indicate "playing", and an "up" button to indicate "not playing". Or you could put an indicator somewhere else in the UI of course (that's what my stereo system does...).

It's not because some company starts to use a certain widget that all of a sudden it should be used for everything...

share|improve this answer
1  
It is widely accepted that CheckBoxes should not perform Commands. As for the lighting up up of a toggle button, I do agree with that. msdn.microsoft.com/en-us/library/aa511452.aspx#general –  jpierson Feb 7 '11 at 17:38

I have been using Toggle Button to "Add" and "Remove" elements to a collection using simple Toggle Button (one with state visible at a time) which had following states.

  • ADD (if button wasn't clicked ever)

  • REMOVE (if the button was previously clicked and an item was now part of the collection)

BUT this always pinched me as for a novice user (age 50+), it was initially hard to understand what has happened and why is button asking to "Remove" even before I learned that item was now part of the collection. The missing bit in this case was a notification message which would say "Item Successfully Added". I am using a Javascript Based Status Message which appears on the top of screen (using http://twitter.github.com/bootstrap/javascript.html#alerts) but since it was visually displaced from the element of interaction, I only solved a part of the problem for some users.

Another Issue

Your button changes its "Stance" or "Flips its sides" after every click. Sometimes it says "I am the add button" and some times the same button (in the same column among other add buttons) it says "I am remove button". Changing colors help but these are still two opposite roles taken up by one button. NOT SO RIGHT.

My Solution:

My solution to this minor and well discussed issue is to replace the toggle button with something like that.

Button which has Caption "Add" when not clicked After Click, Button replaces itself with a message "Successfully Added" and shows a small 24x24 button which has label "X" and which allows you to cancel your last act which is always "Add". Thus you never click a "Remove" button but only "cancel" your previous "Add Operation". Also you don't need to show a separate "Successfully Added" notification on the page. Down side of this approach is that that you need more space to put "Successfully Added" label and a "Button to Cancel" but this in my opinion is one of the less confusing approaches.

enter image description here

share|improve this answer
    
What if you start with a state where some things are already present (possibly added by a different user or a long time ago)? Do you show a mix of Add / Remove / Added to my list[X] / Removed from my list[X]? –  maaartinus May 18 at 4:56
1  
Toggle button has two states. If you had to introduce a third one, for example add/remove from "global-list" and add/remove from "my-list", I would group two toggle states visually together and place the third button "add to my-list" button next to them. As a UX designer, you can consider simplifying user-flows and interaction rules. If you could separate "my-list" interactions from "global-list" interactions, that would be the right thing to do. –  Salman May 23 at 1:04

For the Play/Pause example, I'd show the current state normally and the opposite on mouse-over (when that's appropriate i.e not on touch screens). That item has 2 natural states and no unifying verb. On/Off on the other hand can be simplified to Power with the On state being lit and the off state, well, not.

share|improve this answer
    
I agree, please look at my question which proposes this type of visualization and interaction. I'd like your input. ui.stackexchange.com/questions/3331/… –  jpierson Feb 7 '11 at 17:34

The label on the toggle button like Play/Pause should not change. The button itself should visually indicate that it is pressed (leaving the label 'Play'). This eliminates all the confusion.

share|improve this answer
    
I think your answer is very similar to what Rob Allen also proposes. –  jpierson Feb 7 '11 at 17:35

I'd always go with current state. I think the play/pause idiom is the exception rather than the rule. I think play/pause being like it is, is possibly a holdover from the days of old cassette tapedecks. When play/pause were combined on CD players, I remember thinking how cool & innovative that was.

Anyway, one way to make it obvious that the current state is "selected" is to make the button glow a bit, or outline it with some magic looking blue.

enter image description here

Magic blue usually means some state is "on"

So, the above button is actually a tri-state button from iTunes. It has 3 states: repeat off, repeat all, and repeat 1. It's pretty clear what's happening here from the button's face. Repeat 1 is on.

As another example, I have 3 different cameras settings that are toggled by a single button: orthographic 1-up, orthographic 4-up, and perspective. A single button cycles through these 3 states, and I'm showing the current state on the face of the button.

Single buttons for multiple state are not that confusing once you get used to them. They are great because they group mutually exclusive settings, and they save cluttering the UI up with many distinct buttons. In a way, they are like a compact radio button.

Other options I could think of are:

  • Show current state, and pop out a menu to change state (even if there are only 2 options)

An example of this is how Mac os shows you the state of your BlueTooth or Airport -- it even has a popout with full sentences about what each action will do:

enter image description here

It shows its current state (faded gray means off), and it shows next states via a popup menu with full sentences.

share|improve this answer

Labelled buttons (toggle buttons) are often confusing or even ambiguous, as you point out. Instead,
show the status and the action, like this:

Online   Go offline

So we have a non-clickable label clearly indicating the current status, and a clickable button to carry out an action to change the status.

If you click the "Go offline" button, then the label changes to "Offline" and the button changes to "Go online".

Showing both the current status and the action at the same time is the only way to be completely clear. Radio buttons would do this, but the label + button solution is better because it offers a clear visual distinction between the two. Also it is naturally more compact than radio buttons.

As for the alternatives, I think it's agreed that toggle buttons can be problematic. Even checkboxes may be confusing:

    Online

The checkbox is not checked, so the application is offline. But this isn't particularly clear. If you glance at it, the first thing you see is the word "Online", so it's easy to draw the wrong conclusion.

The trouble is that all you can see is a single label. You have to think for a bit before you can decide whether the label indicates a status or a command. This problem is common to checkboxes and buttons, and trying to consistently use adjectives (or verbs or whatever) may improve things but will not make the problem go away.

share|improve this answer

@Kato's answer images from Evernote put it clear: there is the label communicating what is controlled by the toggle ("Auto save"), and the toggle, which doubles as a state indicator (O | I).
The problem with some toggles is trying to use the same bit for two different purposes: communicating the state, and communicating th action.
My home´s lights, for example, have an anonymous toggle and a bright indicaror, which is the light itself (when the bulb fails we usually can´t tell if the toggle is in the on or off position).
The play | pause arrangement also has a clear on indicator, the sound of the music itself. The toggle fulfills one function (control), the music fulfills the other one (communicate state).
The shffle vs. linear toggle controls the state, but doesn't communicate it. You would need to grab the CD case, wait for a theme to finish, and check if the one that starts after is the next in the list or not (and repeat to be sure). But if you think it as a shuffle | not-shuffle binary option, then you might label after the behaviour it controls ("shuffle" as a verb) and communicate the state by illuminating it.
As I see it, in any case you need to communicate the state.
A friend of mine is mad about his car's lock remote control. It has a state printed and he doesn't know if it's the action or the feedback.

share|improve this answer

To reduce ambiguity I suggest:

  1. Use the action as the text of the toggle button, not the state.

  2. Make sure the button isn't highlighted.

  3. Highlight the action on mouse over/focus to emphasize what will happen.

  4. Highlight the current state and place it next to the button.

E.g...

enter image description here

(other examples: "turn on"+"off", "turn off"+"on")


Or you could use sliders and

  1. Highlight the current state, which should appear on the thumb control

  2. Place the action that transitions the state within the empty area (do not highlight it)

E.g...

enter image description here

(Imagine the thumb control looks like a thumb control and not like a button)


Taken from my answer to the closed duplicate question with some improvements.

share|improve this answer
    
I like the idea, but the single letter difference means it takes ages (at least now when my eyes are tired). The colors are highlighting the current state but they also invite me to push them down. The gray area look like pushed... so much negative points from a newbie here, no offense meant! –  maaartinus May 18 at 5:07
    
@maaartinus None taken. Ideally the sliders should look more like grips than like buttons, however, I was too busy to draw them and just used PowerPoint for the sketch. –  Danny Varod May 18 at 14:26

A reasonable compromise would be to have the button not highlighted (have a neutral background color perhaps) when it's on the off state, and highlight it (change background color) when it's in the on state.

share|improve this answer
1  
Welcome to UX.SE! When you say highlight, do you mean the border, as when something is focused? Could you provide maybe an image detailing what you are talking about? –  Code Maverick Jul 9 at 14:40
    
@code-maverick Clarified in an edit –  marksomnian Jul 9 at 14:56

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.