vector image creation menu

This menu is for creating empty vector images. The procedure is:
- Enter the name you want for the image file in the Vector image menu field.
- Enter the number of rows and columns you want in the Rows and Columns menu fields.
- Enter the Pixel size and Units you want for the image. These values determine,
together with Rows and Columns, the physical size of the image.
- Set the Open polygons? toggle to Yes if you want the polygons in the image to
be left open. Set it to No if you want all polygons to be closed.
- Click on CREATE THE IMAGE.