Mouse 
	Timeline
		double left click sets cursor position
		double right click starts and completes drawing a data entry event with a duration 
		mouse wheel zooms in on mouse pointer
		left click on legend items shows and hides sensor plots
		left click on sensor events and data entry events selects them

	Video
		mouse wheel zooms 

	Map
		mouse wheel zooms 
		double left click sets cursor position

	Measurement
		double left click sets corners for rectification (must be drawn clockwise) 
		double right click sets measurement points - click fast to make multi-segment lines
		left click and drag to adjust any points (rectification, calibration and measurement)
		double middle click to add additional calibration lines 



Key commands used to manage user created events - only available when the timeline window has focus 
	Key_Delete: delete selected event
	Key_Return: open selected event
	Key_Enter: open selected event
	Key_Slash: add point in time marker
	Key_Up: jump to previous data entry event
	Key_Down: jump to next data entry event
	Key_Left: jump to next sensor event (such as RFID tag read)
	Key_Right: jump to previous sensor event
	Key_Escape: deselect everything and cancel drawing of duration event
	Key_J: jump to related event
	Key_A: adjust the left boundary of selected duration event
	Key_S: adjust the left boundary of selected duration event
	Key_Apostrophe: adjust the position of selected event
	Key_Period: start and stop creation of duration event


Application wide playback control keys - will work regardless of which window has focus
    	Playback speed
		Key_Space: toggle between play and pause
		Key_R: decrease speed one step
		Key_T: 1x
		Key_Y: increase speed one step

	Jump forward and backward
		Key_1: jump back 5 seconds
		Key_2: jump back 3 seconds
		Key_3: jump back 1 second
		Key_4: jump back 1/2 second
		Key_5: previous frame
		Key_6: next frame
		Key_7: jump forward 1/2 second
		Key_8: jump forward 1 second
		Key_9: jump forward 3 seconds
		Key_0: jump forward 5 seconds

