There should be a screw inserted directly into the awning rail through the fabric bead.
Awning fabric crooked.
Here is brad taylor showing how to adjust an awning fabric.
Make sure the awning rolls out evenly and that the fabric is not bunched to one side.
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.
During regular use of your rv the awning fabric and slide in the awning tube causing alignment is.
You may also notice the arm brace rail on the rv does not line up with.
Rv awnings have one thing in common the canvas vinyl or fabric can become misaligned over time.
This keeps the fabric from shifting in the awning rail at the roof line.
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.
If the awning seems crooked or bunched slide the fabric left or right along the track as needed to even it out.
You may notice the awning wind up crooked on the roller tube.
Awning fabric is versatile with many outdoor applications including as shade for pergolas or an outdoor living area.