You can remove or regain trimmed frames
from either end of a clip by dragging the clip’s edge in the Expert
view timeline. To help you locate the desired frame, the Monitor
panel displays it at the changing In or Out point of the clip as
you drag. If another clip is adjacent to the edge you’re trimming,
the Monitor panel displays the frames of both clips side by side.
frame on the left (the Out point) is earlier in time, and the frame
on the right (the In point) is later in time. Subsequent clips,
as well as blocks of empty space, in the Expert view timeline shift
as you drag the clip’s edge.
A tool tip displays the number
of frames you are trimming as you trim them. This window displays
a negative value if you drag the clip’s edge toward the beginning
of the movie.
It displays a positive number if you drag toward
the end of the movie. You can tell whether you have trimmed a clip
by looking for a small gray triangle in the top corner at either
end of the clip in the Expert view timeline. The triangle indicates you
have not trimmed that edge.
For linked clips (video that includes
a soundtrack), dragging the edge of one clip changes the In or Out
points of both clips. Sometimes you want to trim linked clips independently
to create split edits (also known as L‑cuts and J‑cuts). Pressing
Alt when you trim allows you to set the In and Out points of the
video and audio separately.