Relative math operations with defined and mixed values in input fields
When you have several objects with different parameters in your selection, Illustrator would show nothing in the input field controlling this parameter.
For example, if you have two paths selected, one having 1 pt stroke weight, and another with 4 pt — Ai would show nothing in Weight in Stroke panel, meaning it’s a 'mixed value'.
What if we could focus this field, type '+5' in it, and get 1+5=6 for one path and 4+5=9 for the other?
Why not making it work for similar value as well? Instead of putting the cursor after the, say '2.25 pt' and type '+2' so it goes '2.25 pt+2', when we could just replace it with '+2', with no aiming?
Take a look at the demo attached.
Plus, take a look at the request about having more than one math operation possible in input fields:
http://illustrator.uservoice.com/forums/333657/suggestions/31286416

-
iviansur commented
Yes, do math. Plus, minus, divide, multiply… values and %.