To exclude text from text and spelling inspections, click the Cross-out Text icon. 

Click and drag the crosshairs that appear over the text to be excluded in either the Master or Sample panel. Multiple selections can be made.

To apply a cross-out to different portions of a multi-page file, right-click on the crossed-out text.
Select to apply the cross-out to all pages, odd pages, even pages, or identical text elsewhere in the menu that appears.
removes the currently selected crossed-out text.
Clear All
removes all cross-outs.

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