Options

Set frame scale: (0.2 - 2.0)

/foption scale 1.0

Toggle frame dragging:

^{Hold down left mouse button on focus portrait to move it.}

/foption lock

Toggle fading of frame when focus hasn't been updated for ~10s:

/foption fade

Toggle hiding of frame on loading screens/release spirit:

/foption nohide

Reset to default:

/foption reset

For more advanced use cases, you can edit the focus frame directly using scripts just like with the target frame. Just replace "Target" with "Focus" for the frame names.