This is the lower-left corner of a document window:
It displays 110% and even lets me input another number. That's great alredy, but you don't always want to grab the keyboard for things like this.
Wouldn't it be great if it scaled to 100% when I double-click the document icon? Or if there was a popup with "acutal pixels / fit screen / fill screen" behind that icon?
Hello! Good idea, don't forget to post it on http://feedback.photoshop.com
For the moment: If you hold CTRL(Pc)/CMD(Mac) as you hover a numeric input box, you can scrub its values (scrubby sliders)
Add Shift, and it'll move by 10 increments. ALT for smaller moves.
There are keyboard shortcuts that could also help you out...
Ctrl+0 zooms the document to Fit Screen
Ctrl+Alt+0 zooms the document to Actual Pixels
*Trade Ctrl with Cmd and Alt with Option if you're on a Mac