Timeline Zoom: Alt + mouse wheel
Timeline Scrolling: Ctrl + mouse wheel
Show entire timeline: Shift + Z
Set Mark In: I
Set Mark Out: O
Clear In & Out: Alt + X
Timeline Zoom: Alt + mouse wheel
Timeline Scrolling: Ctrl + mouse wheel
Show entire timeline: Shift + Z
Set Mark In: I
Set Mark Out: O
Clear In & Out: Alt + X