Selection Tools
Move Selection tool:
Once you have created a selection use this tool to move it on the picture. This does not move the pixels underlying the selection.
Create Selection tools:
Using selections you can later apply any image processing only to selected parts of the picture. You can select complex regions using different tools like the following:
Select by color 
This selects area of similar color in all the picture, using a tolerance.
Select by Magic Wand 
This selects area of similar color locally, using a tolerance.
Select by painting 
You can paint a selection with this tool.
Select by Lasso 
You can define an irregular region selection by drawing its borders
or you can use geometric selection tools like
Rectangular, Elliptic, Linear or Pencil selections  |