More easiler and fun!!
1)First of all, open up an image from File>Open

2)Select the Freehand Selection Tool from Tool Box, begining to select a object, maybe choose \"Zoom in\" making larger selecting.

3)When selection is complete, go to Selections>Modify>Contract. Let the small shape what you want to cut out.

4)After choose from Selections>Modify>Feather, that will make edges smooth.

5)Go to Selections>Invert then press delete button on your key board, just keep you selected.

6)Use Crop Tool to circle the area you want to cut out, choose \"Apply\".

7)Go to File>Export>Picture Tube, giving a tube name then click \"OK\".



9)Open a same image which you duplicated, then you can available draw it anywhere on the image.
