criticsdarling! Lucky you, there are easy ways to do it, it really depends on what kind of image your working on,
For more geometric cut out, use Cropping tool (the one under the lasso tool, or third one from left side on the dropdown menu)
More organic one use lasso tools, there are three different lassos, choose the one that most desire to frame around your images, than you can wither crop out that image, copy and paste or transfer by holding down the Move and drag it over to the college you are working on.
Sometimes Clipping Mask also works fine
If you have any question about the functions, I can post more detail steps.

For more geometric cut out, use Cropping tool (the one under the lasso tool, or third one from left side on the dropdown menu)
More organic one use lasso tools, there are three different lassos, choose the one that most desire to frame around your images, than you can wither crop out that image, copy and paste or transfer by holding down the Move and drag it over to the college you are working on.
Sometimes Clipping Mask also works fine
If you have any question about the functions, I can post more detail steps.
