Pictures?

Take the handle and the cap off and remove the white bottom trim piece.

Try not to break the trim piece, could be held in place by a few finished nails.

Thanks for the replys. I cant figure out how to remove the bottom trim piece. Looks to me like I have to remove the side pieces first. But I can’t figure out how to remove them either. I figure ask before I break them

Use a flat bar, the thinner edge the better, and gently pry it up, if it's painted you might want to score the paint with a utility knife so you don't pull the paint.

Something like this could also work

Thanks GN builders. I sent a picture above. Looking at it, I have to remove the vertical pieces before the bottom horizontal piece will come out. But I don’t know how to take this windows pieces apart

It's hard to tell from the pictures, but there has to be a way to get to the screws. I have done many of them and each one is different, just take your time and see what needs to be done to get access to the screws.

Is the something that tells you who is the window manufacture? If you open the window, usualy there is a sticker on the top or side of the frame or a stamp on the glass in one of the lower corners.