It's funny. I have a Canon printer, and sometimes when I tell it to print music, the staff lines start to wobble up and down a bit partway down the page. The wobbling starts at different places on different pieces.

I just received jpg's of music via Gmail, and when I printed straight from Gmail, by clicking on the attachment, the problem occurred. But if I downloaded the pages and printed them as if they were a photograph, they came out perfectly.

The wobbling also occurs when I use NoteworthyComposer. If I seek customer service, I will get fobbed off with a forum, where I don't suppose anybody will know anything.

Why would my lines wobble sometimes but not other times?