Allows you to check that content aligns in the proper position with pages and press sheets, and has sufficient safety margins for type and other content.
Show Imposition: Menu selection toggles all selected imposition component indicators on and off. Can also be selected by clicking the Imposition icon 
in the Toolbar.
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Imposition indicators that can be toggled on and off:
- Press Sheet Edge Select from the menu or click the
icon in the Toolbar. - Bleed Edges Select from the menu or click the
icon in the Toolbar. - Page Edges Select from the menu or click the
icon in the Toolbar. - Page Numbers Select from the menu or click the
icon in the Toolbar. - Type Safety Edges Select from the menu or click the
icon in the Toolbar.
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Backup: Allows you to select which elements will be used to align Fronts and Backs for viewing backup. Some impositions (such as certain Work and Tumble layouts) won't align for viewing unless Press Sheet is selected for alignment instead of Plates.
- Plates
- Press Sheets
- Pages
Flip Sheet: Swaps the Front and Back Surfaces in the viewing Window. The surfaces and separations displayed will also be swapped in the Inventory > Separation panel. Keyboard shortcut ⌘-F / Ctrl-F.
Versioning Info... If an imposition has been created using Layered Prinergy Versioning and output with Advanced TIFF Tags, additional versioning information is available for viewing and evaluating version separations. Click this link to see all Versioning Info...
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Rotate Left Rotates the selected separation 90 degrees counter-clockwise. Also activated by clicking the Rotate Left button in the Toolbar. 
Keyboard shortcut ⌘-L / Ctrl-L.
Rotate Right Rotates the selected separation 90 degrees clockwise. Also activated by clicking the Rotate Left button in the Toolbar. 
Keyboard shortcut ⌘-R / Ctrl-R.
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More Opaque Makes the selected surface more or less transparent, as an aid to viewing backups. Keyboard shortcut ⌘-] / Ctrl-].
Less Opaque Makes the selected surface more or less transparent, as an aid to viewing backups. Keyboard shortcut ⌘-[ / Ctrl-[.