Need help with channel

I'm using channel as a dummy ability because I need to disable movement and attack for the hero while the script runs. Only I have 2 problems.

1) Targeting image (single unit) won't show in visible map area. Will show outside area, and can target anyway, but is too hard as you can't see the bulls-eye.

2) How do you set it up to turn off and script the de-activation?

I'm at a loss. Please help!

I believe the targetting image can be affected by the Race of the spell, or conflicts between some of the spell being set up to use an AoE cursor, then given a single target... Can you give us a screenshot of your spell in the Ability Editor?

I figured the targeting part - if you select "Unit Target" for target type you can't select "Targeting Image" in options.

I also figured that the "follow through time" is the duration of the ability freeze, but which order string do I set if I want to turn it off early?

Deactivate, Turn Off or Base Order String (by level)?

You can't alter those order strings.

You may be able to simply order the unit to stop or hit it with a .01 stun effect to cancel it.