If you are trying to change the size of those frames all at once, you won't be able to do that with the scale tool. You'd need to select all the vertices along the top, move them upwards, grab all the vertices along the side, move them left, and vice versa. You can use camera based selection to make grabbing the vertices…
Here's a short video showing what I'm talking about. I have some issue getting audio to upload on youtube, but I think you'll get the idea. Problem with using the scale tool is that you'll have a little more trouble getting each frame to be the same size. Of course you can make things precise afterwards by grabbing the…
Looks fine to me. Maybe you are expecting Y to be up and Z to be forward? In this case, it doesn't matter as you are just needing to move the vertices around. You can press D to toggle pivot editing, and then you can transform the pivot however you like. If you are using Maya 2018, you can align the pivot to any component…