hey guys! the RV is going together this weekend(yay!), and I need to figure out the rest of what I need, at least for now. I have the old style, metal rv windows. I love them and will never replace them, but looking at them, I cannot figure out what type of trim to use to cover the screws after installing. ill lay butyl tape and screw them in, but then I'm not sure what to use over the screws. this is what they look like. I cannot figure out how to shrink them, no matter what dimensions I put in, it shrinks down to something extremely small, or absolutely huge. I've tried on Apple preview, imager editor, and directly on this site. the image stays exactly the same no matter what I do. thank you guys!
a link for normal size
https://imgur.com/a/nN1VM