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Section 2 — Control Panel Descriptions
Constant Duration Mode
The following paragraphs describe the operation of keyframe
insertion/deletion in Constant Duration mode. Refer to the
previous portion of this section for operation with Constant
Duration turned off.
CONST DUR forces the overall duration of an effect to be constant
during editing, except as noted here. The length of the existing
effect is unchanged by keyframe deletions (cuts) or additions
(inserts or pastes). When CONST DUR is on, the button is high-
tallied; when off, it is low-tallied if edit mode is enabled, or tallied
off if edit mode is off.
Also, in Constant Duration mode, the
KF DUR button is tallied off,
indicating that keyframe duration modifications are not allowed.
All Inserts and Pastes in Constant Duration mode must be made
on-the-path—they are not allowed on keyframes—except as follows:
An Insert Before may be done on the first keyframe of an
effect, or an Insert After or Paste may be done on the last
keyframe of an effect. The duration and timing of the original
effect are not affected, but the inserted keyframe is appended
to the effect, increasing its overall duration.
When an Insert or Paste is done on-the-path in Constant Duration
mode, the duration of the inserted keyframe is subtracted from
that of the previous keyframe.
A Paste operation in Constant Duration mode is similar to an
Insert After, except that the data to be pasted comes from the
Clipboard Buffer, rather than the Current Working Buffer.
A Cut must be made on a keyframe, whether CONST DUR is on or
off. If a Cut is done in Constant Duration mode, the keyframe state
is deleted and the duration of the cut keyframe is added to the
duration of the previous keyframe. The Time Cursor remains
positioned at the point of deletion.
NOTE:
The following operations are the same whether
CONST DUR
is
on or off.
CONST
DUR