Not exactly what you want but perhaps it’s close enough. These were taken from the following URL – https://help.adobe.com/en_US/aftereffects/cs/using/WSCEBCDB03-0A9C-459e-873E-F5A10520F24A.html
Increase or decrease Rotation (Z Rotation) of selected layers by 1°
+ (plus) or – (minus) on numeric keypad
+ (plus) or – (minus) on numeric keypad
Increase or decrease Rotation (Z Rotation) of selected layers by 10°
Shift++ (plus) or Shift+- (minus) on numeric keypad
Shift++ (plus) or Shift+- (minus) on numeric keypad
Increase or decrease Opacity (or Intensity for light layers) of selected layers by 1%
Ctrl+Alt++ (plus) or Ctrl+Alt+- (minus) on numeric keypad
Control+Option++ (plus) or Control+Option+- (minus) on numeric keypad
Increase or decrease Opacity (or Intensity for light layers) of selected layers by 10%
Ctrl+Alt+Shift++ (plus) or Ctrl+Alt+Shift+- (minus) on numeric keypad
Control+Option+Shift++ (plus) or Control+Option+Shift+- (minus) on numeric keypad
Increase Scale of selected layers by 1%
Ctrl++ (plus) or Alt++ (plus) on numeric keypad
Command++ (plus) or Option++ (plus) on numeric keypad
Decrease Scale of selected layers by 1%
Ctrl+- (minus) or Alt+- (minus) on numeric keypad
Command+- (minus) or Option+- (minus) on numeric keypad
Increase Scale of selected layers by 10%
Ctrl+Shift++ (plus) or Alt+Shift++ (plus) on numeric keypad
Command+Shift++ (plus) or Option+Shift++ (plus) on numeric keypad
Decrease Scale of selected layers by 10%
Ctrl+Shift+- (minus) or Alt+Shift+- (minus) on numeric keypad
Command+Shift+- (minus) or Option+Shift+- (minus) on numeric keypad
You can of course modify the shortcut keys -> https://help.adobe.com/en_US/aftereffects/cs/using/WS3bf812c123007fb85828bf13126e8183f60-8000.html
The Bug/Feature URL seems to be broken. I believe that this is temporary. Here’s the link though – https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform
HTH
RoRK
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