plastic back window on convertible

I have a problem with my convertible top. The back plastic window is coming out. I would like to know if there is an easy way to fix this. I want to sew it by hand, but want to know if I should tape and or glue it before I sew it or does anyone have any other suggestions.

Thanks,
S

It depends if the zipper is just coming undone or the zipper getting pulled away from the top. If you are going to sew it, you just might need a helping hand to hold in place while you do the job.