Defining Diagram Setup (MEGA Windows Front-End)
To specify diagram setup:

Select
File > Page Setup.
The Page Setup dialog box enables specification of diagram characteristics, that is the Paper Size, Orientation (in Portrait, the larger dimension is vertical, in Landscape, the larger dimension is horizontal).
The Number of Pages group box allows you to indicate the total size of the diagram in number of pages.
To change the number of pages:

Click on the page corresponding to the bottom right corner.
You cannot reduce the size of a diagram if elements appear in deleted pages: all elements should be placed in pages that will be kept before reducing format (display of page boundaries simplifies this operation).
The Margins are superimposed on those defined by the printing device. This is done so that any information in these margins is not lost.
You can also indicate a print Scaling percentage.