This is a simple script/keyboard shortcut I use daily, when setting up my work computer I couldn’t find it anywhere else online so am sharing it here.
All it does is change the playback range of your timeline. In a similar fashion to QuicktimePro, pressing “i” will change the playback range to start on the current frame, pressing “o” will make it end on the current frame. It doesn’t affect the length of your timeline, just what section will be played. It’s much quicker than dragging Time Slider or entering frame numbers.
Set the start of the playback range (assigned to the “i” key):
playbackOptions -min `currentTime -q`;
Set the end of the playback range (assigned to the “o” key):
playbackOptions -max `currentTime -q`;