Zoom works in two ways in Ai – one is based on the pixel density of the display, and other is on actual (physical) size of the element. The setting to control this is in:
Preferences > Display Print Size at 100% Zoom
Above setting ensures what you see at 100% zoom would be the physical size of the art. You can actually put a ruler against the screen and a 1inch rectangle will measure 1in on screen at 100%.
But this may not work right for screen design workflows. Make sure you uncheck this, if actual size zoom is not needed.
An error occurred while saving the commentAnonymous commented
Thanks @Lidoo for your comment :
"You have to go to Preferences > General and uncheck "Display print size at 100% Zoom"
That's the solution !
Adobe could pass the information instead of recommending the update :-(