Festus2 -
Check the ends of the awning. I would guess that you will find on the caps two types of "holes" opposite each other. One set will be only a hole in the first "shoulder", the other will be a hole through both "shoulders" of the end caps. Visit HD or other hardware store and get (in American terms) a couple of 2 inch long, one-eighth inch diameter cotter pins. Now, get some help both for pulling the awning out slightly and spotting you while up on a ladder.
Extend the awning only a small amount so the smaller holes are parallel to the ground. You will probably find that the cotter pin will slide into these holes at that point and through a hole in the awning axle such that the pin will have pressure put on it from both end cap holes. Put pins in both end caps! Now the awning should be locked partially extended - and you shouldn't have to worry about the torsion suddenly unwinding as in some old cartoon. Wouldn't want to see you wrapped up in the awning rolling around the bar with little tweety birds flying around your head!
Now that the awning torsion spring is locked, you should be able to align the material where it attaches to the RV as you desire. Once in place, just take the pressure off the cotter pins (by pulling the awning a slight amount) and remove them.
I need to post how I retensioned my slide awning in a similar manner. I do have a few pictures to show.
Ron
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2011 Alpine 3640RL (Beauty)
(Gone! Now replaced by Beauty3)
2016 Ford F-450 (The Beast)
Diesel 4x4, DRW, LB, CC
Comfort Ride Hitch