Step by Step what I'm doing:
1st. Click Add New Layer. (over another image or blank canvas)
2nd Import from File. (find appropriate image on my file)
3rd Rectangle tool. (to crop my image the way I want it to look)
4th Crop to Selection. (to actually crop or cut out image after rectangle)
5th Save. Then I repeaT this for each image. But when I get to the second image the third overwrites the second one. I use the little scroll arrow in the box at top right and it only scrolls two images as well. Maybe I'm skipping a step?