Interface Elements for Desktop > Print Preview > Print Preview for WinForms > Scale Print Preview by Specifying Width in Pages
To scale a document to fit into X pages, click the Scale 
button on the toolbar. The Scaling dialog will be invoked.
Set the required number of pages in the editor.
Click OK to save changes and close the dialog.
Note
If you're working with a document loaded from file, you cannot use scaling.
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