With some edits on the timeline it is possible to do trimming. By trimming you shrink or grow the edit boundaries (head or tail) by dragging them. In drag and drop mode or cut and paste mode, move the cursor over an edit boundary until it changes shape. The drag handle shows as a left or right facing fat arrow when you cursor near the clip start or end. If the cursor faces left, the dragging operation affects the beginning of the edit. If the cursor faces right, the dragging operation affects the end of the edit.
The effect of each drag operation not only depends on the behavior button but whether the beginning or end of the edit is being dragged. When you release the mouse button, the trimming operation is performed.
For all file formats, other than still images, the extent of the trimming operation is limited to the source file length. Attempting to drag the start of the edit beyond the start of the source, limits it to the source start. In all trimming operations, all edits which start on the same position as the cursor when the drag operation begins are affected. You have to disarm tracks in order to prevent edits from being affected.
You have 6 different choices of which mouse button to use for specific types of editing while using the drag handle. You change the drag handle mouse effects by using the Settings → Preferences → Interface tab and modifying the Editing section as shown in the next figure 6.3. The drag handle affects not only the clip you are working on but also frequently the entire duration of all clips on the timeline.
A description of the fundamental/common terminology for choices follows.
The next table displays the options and results with the Key Table here first.
s = src media start p = proj position l = length c = cut distance rest == p+=c: for rest of clips 01 = flags edits_moved, rest_moved |
Drag Left | Drag Right | |||
---|---|---|---|---|
curr s += c, l -= c; + rest | ← | → | rest | |
abc12345xyz | Ripple left edge 11 → | abc012345xyz | abc2345xyz | |
curr l += c; + rest | ← | → | rest | |
abc12345xyz | Ripple right edge 01 → | abc1234xyz | abc123456xyz | |
prev l += c; curr ps+= c, l -= c | ← | → | ||
abc12345xyz | Roll left edge 00 → | ab012345xyz | abcd2345xyz | |
curr l += c; next ps+= c, l -= c | ← | → | ||
abc12345xyz | Roll right edge 00 → | abc1234wxyz | abc123456yz | |
s -= c | ← | → | ||
abc12345xyz | Slip left edge 10 → | abc23456xyz | abc01234xyz | |
s -= c | ← | → | ||
abc12345xyz | Slip right edge 10 → | abc23456xyz | abc01234xyz | |
prev l += c; curr p+= c; next ps += c, l -= c | ← | → | ||
abc12345xyz | Slide left edge 10 → | ab012345wxyz | abcd12345yz | |
prev l += c; curr p+= c; next ps += c, l -= c | ← | → | ||
abc12345xyz | Slide right edge 10 → | ab12345wxyz | abcd12345yz | |
curr s -+= c, l += c; + rest | ← | → | rest | |
abc12345xyz | Edge left edge 11 → | abc2345xyz | abc0123456xyz | |
curr l -+= c; + rest | ← | → | rest | |
abc12345xyz | Edge right edge 01 → | abc1234xyz | abc123456xyz | |
Next, a more immediate and colorful view shows these trimming options (figure 6.4).