Result
Windows
Mac OS
Select next keyframe
Right Arrow
Select previous keyframe
Left Arrow
Select next track
Down Arrow
Select previous track
Up Arrow
Play a scene beginning at the current time cursor location
Enter (numerical keypad)
Stop scene playback
0 (numerical keypad)
Create a new keyframe
Ctrl-click a time track
Command-click a time track
Duplicate a keyframe
Alt-drag keyframe
Option-drag keyframe
Create an action placeholder
Ctrl-click action on action track
Command-click action on action track
Scale an animation while maintaining the relative time positions of all keyframes on the same time track
Ctrl+Shift-drag
Ctrl-drag