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I need to show pfm users that they can perform some mathematical operations directly in the text fields. like in Sketch App? But how to do it best. if I want to make users don't need to think about It?

  • Hi Andrei, welcome to UXSE. A few thoughts about your question: you've described a potentially complex interaction. Unless you get lucky and someone already knows a pattern you can copy, then you're asking for help solving the problem yourself. In those cases it's usually better present the question as "I have problem X. I came up with solution Y, but I don't think it works. How can I fix this or make something better". This is generally better than "I need to make something complex. I have nothing so far. Please help". – dennislees Mar 27 '18 at 16:25
  • My first question is, if you're referring to Sketch as a comparison, what's wrong with their solution? The answers to design interaction problems are usually best found in describing how a design or idea doesn't meet your goals. Hence my other comment above. – dennislees Mar 27 '18 at 16:27
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Why don't you simply give them a hint:

mockup

download bmml source – Wireframes created with Balsamiq Mockups

The idea is to give a hint with a slightly faded text that disappears the moment the user starts typing their own text. Furthermore upon hesitation (user takes a break in typing) you can display a balloon (if your technology allows) hinting the syntax.

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What about giving that information in the field?

mockup

download bmml source – Wireframes created with Balsamiq Mockups

I did not find proper icon in Balsamiq, something like calculator would be better fit. User gets a hint to use calculations. You can make that icon clickable to open formula builder or helper, if you are open to make one.

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