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2 CLEARER
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This is commonplace.

If a user has selected multi-items, for any items where the current values are mixed: that line is displayed in "gray" (unselected, disabled - whatever is relevant in your OS), and there's a written alert "Multiple Values"

enter image description here

  • I've noticed designers are beginning to drop the written alert and just shows the "gray". For today (2015) I'd still add the written alert

  • In the case of a radio button group, just show the line "gray", with all the (gray) buttons unpressed, and add a written alert "Multiple values" (perhaps adding height to that row to do so)

1. Gray the row

Footnote, for checkboxes (not radio buttons), it's pretty much standard now to use a "little line"** to mean "Multiple values". Here:

2. Have a written "Multiple Selection" message

enter image description hereenter image description here

An interesting idea is: for radio button groups could you put the "little line" inside each and all of the radio buttons inIt's that group? Perhaps someone has seen this alreadysimple.

It may be pointless thoughSure, sinceturn off all the whole group will have a gray background, and a written alert "Multiple values"buttons.

  But (Curiosity: compare the two screen shots here. Apple arguably screwed up, regarding the case of the two slight variants of drop-down menus, with Multiple values, they used graness in one1) and not the other!(2) is the key.

This is commonplace.

If a user has selected multi-items, for any items where the current values are mixed: that line is displayed in "gray" (unselected, disabled - whatever is relevant in your OS), and there's a written alert "Multiple Values"

enter image description here

  • I've noticed designers are beginning to drop the written alert and just shows the "gray". For today (2015) I'd still add the written alert

  • In the case of a radio button group, just show the line "gray", with all the (gray) buttons unpressed, and add a written alert "Multiple values" (perhaps adding height to that row to do so)

Footnote, for checkboxes (not radio buttons), it's pretty much standard now to use a "little line"** to mean "Multiple values". Here:

enter image description here

An interesting idea is: for radio button groups could you put the "little line" inside each and all of the radio buttons in that group? Perhaps someone has seen this already.

It may be pointless though, since the whole group will have a gray background, and a written alert "Multiple values".

 (Curiosity: compare the two screen shots here. Apple arguably screwed up, regarding the case of the two slight variants of drop-down menus, with Multiple values, they used graness in one and not the other!)

This is commonplace.

1. Gray the row

2. Have a written "Multiple Selection" message

enter image description here

It's that simple.

Sure, turn off all the buttons. But (1) and (2) is the key.

1
source | link

This is commonplace.

If a user has selected multi-items, for any items where the current values are mixed: that line is displayed in "gray" (unselected, disabled - whatever is relevant in your OS), and there's a written alert "Multiple Values"

enter image description here

  • I've noticed designers are beginning to drop the written alert and just shows the "gray". For today (2015) I'd still add the written alert

  • In the case of a radio button group, just show the line "gray", with all the (gray) buttons unpressed, and add a written alert "Multiple values" (perhaps adding height to that row to do so)

Footnote, for checkboxes (not radio buttons), it's pretty much standard now to use a "little line"** to mean "Multiple values". Here:

enter image description here

An interesting idea is: for radio button groups could you put the "little line" inside each and all of the radio buttons in that group? Perhaps someone has seen this already.

It may be pointless though, since the whole group will have a gray background, and a written alert "Multiple values".

(Curiosity: compare the two screen shots here. Apple arguably screwed up, regarding the case of the two slight variants of drop-down menus, with Multiple values, they used graness in one and not the other!)