I have found that you have more control with the shapes if you don't rotate so i thought i would show you this hint too
1. if you need a oval
2. but when you place it you need it the other way
3. instead of rotating it

4. it is better to select a circle
5. place it
6. and adjust it to be the oval shape you want

7. because rotating 90* these to arrows just do not work the same and i find it hard to adjust to the size you want . (try this and you will see what i mean )

8. These shapes also
9. are the same if you want them best not to rotate 90*
10. because these to arrows don't work the same

11. so pick the square shape that looks like it
12. and adjust to the size you want

Hope this makes sense to you ?