Trackline
Trackline is both a panel and a means for defining tracking segments and positioning the overlay in the composition.
The Trackline panel also contains standard scroll bars and tools for adjusting the time scale.
Time
scale
The Zoom Out button [A] (the '-' key) reduces by half, and the Zoom In button [C] (the '+' key) doubles the current time scale.
With the Zoom slider [B], the time scale can be adjusted gradually from the fixed maximum value down to the minimum value, at which the entire composition fits in the panel.
The minimum scale is set also by the keystroke CTRL+ALT+HOME.
