- Move the playhead
to the right moment.
- Press + Arrow
in the Text tab.
- Drag the two yellow dots
on the preview: one is the tail, the other the head.
- Retime it
with ⇤ Start / End ⇥ or on the timeline's Text & blur row.
The arrow draws itself from tail to head when it appears.
Alternatives
- Draw live while recording: hold the left button and drag. Good for circling things as you talk.
- Combine with a zoom when the target is really small.