| Icon | Description | Shortcut | 
Function
 | 
|  | Up | Alt-UP | 
Scroll upward by half a screen
 | 
|  | Down | Alt-DOWN | 
Scroll downward by half of a screen
 | 
|  | LabelMark | none | 
Mark the timeline(s)
 | 
|  | LabelMove | none | 
Move the marked timeline(s)
 | 
|  | LabelDelete | none | 
Delete the marked timeline(s)
 | 
|  | LabelExpand | Alt-E | 
Expand the y-axis tree label by 1 level
 | 
|  | LabelCollapse | Alt-C | 
Collapse the y-axis tree label by 1 level
 | 
|  | Backward | Alt-LEFT | 
Scroll Backward by half a screen
 | 
|  | Forward | Alt-RIGHT | 
Scroll Forward by half a screen
 | 
|  | ZoomUndo | Alt-U | 
Undo the previous zoom operation
 | 
|  | ZoomOut | Alt-O | 
Zoom Out by 1 level in time
 | 
|  | ZoomHome | Alt-H | 
Reset zoom to the initial resolution in time
 | 
|  | ZoomIn | Alt-I | 
Zoom In by 1 level in time
 | 
|  | ZoomRedo | Alt-R | 
Redo the previous zoom operation
 | 
|  | SearchBackward | Alt-B | 
Search backward in time
 | 
|  | SeachInitialize | Alt-S | 
Search initialization from last popup InfoBox's time
 | 
|  | SearchForward | Alt-F | 
Search forward in time
 | 
|  | CanvasReDraw | Alt-D | 
Redraw canvas to synchronize changes from Preference/Legend window
or y-axis label panel.
 | 
|  | Print | none | 
Print the Timeline window
 | 
|  | Exit | none | 
Exit the Timeline window
 |