In EDraw, you can crop a drawing with a rectangle area and save it as graphic file.
Click Crop the Canvas button in Basic Tools group of Home tab.
Click any position of the drawing, and drag to the position you want.
A crop object will be created and all the region will become gray except the crop object. Resize or move the crop object until you want.
Press Enter or double click the clip object and the Save As dialog will come up.
Type the name you want, and select the graphic format and file direction.
Click Save.