Interface Elements for Desktop > Print Preview > Print Preview for WinForms > Zoom Print Preview In or Out
Zoom In and Out of a Document
•To zoom in a document, click the Zoom In 
button on the toolbar, or press CTRL+PLUS SIGN.
•To zoom out of a document, click the Zoom Out 
button on the toolbar, or press CTRL+MINUS SIGN.
To zoom in or out of a document, you can also hold down CTRL and rotate the mouse wheel.
Use the Magnifier Tool
Use the Magnifier Tool 
to switch between 100% and "fit whole page" views. Simply click anywhere in the document, to toggle views.
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