During regular use of your rv the awning fabric and slide in the awning tube causing alignment is.
Awning fabric crooked.
Rv awnings have one thing in common the canvas vinyl or fabric can become misaligned over time.
The type of awning fabric will depend on the specific needs of your project.
You may notice the awning wind up crooked on the roller tube.
You may also notice the arm brace rail on the rv does not line up with.
This keeps the fabric from shifting in the awning rail at the roof line.
Make sure the awning rolls out evenly and that the fabric is not bunched to one side.
Here is brad taylor showing how to adjust an awning fabric.
Find the pull rope and hook it with your awning rod or have a helper grab one arm while you grab the other and slowly pull the awning out.
This is usually just caused with age and normal stretching due to the wind and rain.
Awning fabric is versatile with many outdoor applications including as shade for pergolas or an outdoor living area.
If it is missing extend the awning and pull on the fabric near the roof rail to center it between the two rafter upper brackets.