Canvas Resizer is a time saver for every designer who regularly increases or decreases the canvas size during his workflow. Instead of going to "Image > Canvas Size" and filling the dialog with the desired percent values, this plugin provides an interface which makes it easy to extend or crop the canvas in specific intervals.

The interactive preview acts like buttons and shows you the expected result in a visual way at the same time. You can choose one of two scale modes.

For extending, these are the scales:

120%, 130%, 140%, 150%, 160%, 170%, 180%, 190%, 200%

or

200%, 300%, 400%, 500%, 600%, 700%, 800%, 900%, 1000%

And for cropping, it's those:

90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%

or

50%, 33,33%, 25%, 20%, 16.67%, 14.29%, 12.5%, 11.11%, 10% (1/2, 1/3, 1/4 etc.)

The panel is customizable (specify which scale steps you want to show) and fits to any theme of Photoshop (light, dark, etc.)