To save part of a picture into another bitmap file
In the toolbox, click
to select a rectangular area or click
to select a free-form area.
Drag the pointer to define the area you want to save.
On the
Edit
menu, click
Copy To
.
Specify a folder and a file name, and then click
Save
.
to select a rectangular area or click 
to select a free-form area. to select a rectangular area or click to select a free-form area.