13. Using VIFRED : Form Layout Frame : Alignment Guides : Margin Rulers
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Margin Rulers
The right and bottom margins of your form contain optional ruler marks every fifth column or row, and a decimal digit every tenth column or row, to help you determine the coordinates of components on your form. The margins containing the rulers are initially positioned off the screen on fullscreen forms. To see them, you need to scroll the form by moving the cursor to the edge of your window, or use the Move operation to move the margins of the form (see page Move the Margins of a Form).
You can turn ruler marks on or off by choosing the Rulers operation on the Form Layout frame. On the pop-up menu, set Rulers to y (yes) or n (no). The default is n (no).