This is about extracting small clips from a source video.
The source video is in the Source pane, you set the in and out points then move the clip to the Playlist or the Timeline, or export it.
The fastest way to set the in and out point is to use the I and O keys. But if you used the mouse wheel or the up/down buttons on the Timecode spinbox to move the playhead, you then need to un-focus the timecode before using I or O.
If it is not possible to make I or O automatically un-focus the timecode, maybe IN and OUT buttons under the player would do the trick?
This would be a time saver when having to extract lots of small clips from a source clip.