Changes options of a Timeline view of a COP image viewer.
imgviewhist [options] view_name [viewport_index]
If viewport_index is specified, only that viewport is affected (1-16). If it is not specified, all viewports are affected.
Image viewer names are always of the pattern imgviewN where N = 1,2,3... (e.g. imgview1).
Enable or disable the view.
Turns on/off the labels.
Turns on/off the guides.
Turns on/off the handles.
Turns on/off the previews.
Turns on/off the frame boxes.
Turns on/off the extend regions.
Turns on/off the timebar.
Sets the grid level (0 = none, 1 = low, 2 = med, 3 = high).
Sets the units to seconds or frames.
Sets the preview rate (set to 1 to show every frame).
Show all COPs in the network.
Show all displayed COPs in the network.
Show all time-sensitive COPs in the network.