Canvas View Menu
From Synfig Studio :: Documentation
The View menu has the following options:
Show/Hide Handles
Preview Quality
Play
Pause
Stop
Flipbook Dialog
Toggle Grid Show
Toggle Grid Snap
Toggle Guide Show
Toggle Lo Res
Toggle Onion Skin
Zoom In
Zoom out
Best Fit
Normal Size
Zoom In on Timeline
Zoom Out on Timeline
Jump to Next Keyframe
Jump to Previous Keyframe
Next Frame
Previous Frame
Seek Forward
Seek Backward
Seek to Begin
Seek to End