You can scale keys to change the duration of a range of keys and animation curve segments.
The Current Time Indicator moves to the clicked position and the key is now selected.
If Time Range-All is on in the Scale Keys Options, all keys for the current object are scaled.
If Time Range-Start/End is on in the Scale Keys Options, only keys between the specified Start and End times are scaled.
If Time Range-Time Slider is on in the Scale Keys Options, only the keys between the Range Slider’s Start and End times are scaled.
The Scale Keys Options window closes.
The Scale Keys Options window remains open.