Use the Guides and Grid pane of the Preferences dialog box (QuarkXPress/Edit menu) to specify various default settings for guides and design grids.

The Snap Distance field enables you to change the 6-pixel default distance at which objects snap to page guides when Snap to Guides is chosen (View menu) (range = 1 to 216, measurement system = pixels, smallest increment = 1).

In the Guides area:

• To specify default margin and guide colors, use the Margin Color and Guide Color buttons.
• Click In Front of Content or Behind Content to specify whether ruler guides and page guides are placed in front of or behind all items on a page.

In the Page Grid area:

• To control the minimum zoom value at which the master page grid and text box grids become visible, enter a value in the Zoom Visibility field.
• Click In Front of Content or Behind Content to specify whether the master page grid is placed in front of or behind all items on a page. If you click In Front of Content, you can also specify whether the master page grid is in front of or behind guides.