We are working on a software with a design close to Office 2013 (2D icons, main colors black and white).
We have a button which allows the user to change the units in the software. We are looking for an icon explicit for users. Units in this case are temperatures : °C, K, °F, but also distances : meters or foot.
What would be a good icon to represent this button? Our problem is that the icon must be
16x16 pixels. We just have no idea what to represent.
Currently it is not explicit:
Do you have any idea ?