RichTextEdit controls
The BottomMargin property specifies the size in inches of the bottom margin on the printed page.
To set the bottom margin:
Enter the desired size in inches in the BottomMargin field of the Document tab page of the RichTextEdit control’s Properties sheet.
The BottomMargin property takes a long value. The following example sets the bottom margin of a printed page of a RichTextEdit control to 1 inch.
rte_1.BottomMargin = 1