Adobe Photoshop CC 2014 v.14.xx - Manual (Page 29)

Arrow keys
H
L
W
Straighten vertically
Automatically straighten both vertically and horizontally
Straighten horizontally and vertically
3. Once you're done adjusting the perspective, click the Commit Perspective Warp icon ( ).
Keyboard shortcuts
The following keyboard shortcuts make it easier to adjust perspective:
Slightly move a corner of a quad (pin)
Hides the grid when you're working in the Warp mode
Switches to the Layout mode
Switches to the Warp mode
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