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The Keyframe Animator View menu has the following options:
Show time in frames (the default) displays the time in frames (on the timeline and in the time text field).
Show time in seconds displays the time in seconds (on the timeline and in the time text field).
For animations under one minute, the format is ss.ss (s stands for seconds).
For animations between one minute and one hour, the format is m:ss.ss (m stands for minute).
Limit playback to range allows you to loop through a small piece of a larger animation while you are editing the animation.
The range slider is located above the current time trough in a second trough. The slider is a bar that allows you to define a range of keyframes (to select, then cut or paste, for example). To move the beginning or end of the range, drag on the beginning or end of the bar. To keep the range the same length but move it to a different part of the animation, drag on the middle of the bar.
To move the closest end of the bar to the current cursor position, click anywhere in the trough (either to the left or right of the bar, or above it). Ctrl+click to move the farthest end of the bar to the current position.
If Snap to Frame is on, the range slider snaps to the closest frame. If frames per second changes, the bar resnaps.
Show empty field lines displays all fields--even unused ones--when you expand a property line. Normally, when you expand a property line down to the field level, only fields with animation are shown. Unused fields are not displayed at all unless you enable this option.
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