To exclude parts of a page when exporting, you can use the Crop tool 
to temporarily crop one or more pages. (For information on working with the Crop tool, see Cropping pages.)
As a result, everything outside the cropping area will be omitted when exporting.
Proceed as follows:
| 1. | Select Crop on the ribbon tab Pages | group Crop, and drag an area with the mouse. |
| 2. | After the export has been performed, you can remove the cropping again with Remove crop  . |