Thumbnails are displayed in the Pages panel. You can enlarge, reduce, embed or un-embed thumbnails.
To reduce thumbnails
Open a PDF file.
Display the Pages panel in the Panel area
Right-click a thumbnail and select Reduce Page Thumbnails from a shortcut menu, or
Click Options and select Reduce Page Thumbnails.
To enlarge thumbnails
Open a PDF file.
Display the Pages panel.
Right-click a thumbnail and select Enlarge Page Thumbnails from a shortcut menu, or
Click Options and select Enlarge Page Thumbnails.
To embed thumbnails
Open a PDF file and display the Pages panel.
Right-click a thumbnail and select Embed All Page Thumbnails from a shortcut menu, or
Click Options and select Embed All Page Thumbnails.
Click OK in the warning message dialog box.
Save your file. File size will increase.
To remove embedded thumbnails
Open a PDF file and display the Pages panel.
Right-click a thumbnail and select Remove Embedded Page Thumbnails from a shortcut menu, or
Click Options and select Remove Embedded Page Thumbnails.
Click OK in the warning message dialog box.
Save your file.
Notes
Thumbnails are always available for PDF pages. If they are not embedded, they are created on-the-fly whenever you open the Pages panel. Embedding thumbnails allows them to appear faster. By default thumbnails are not embedded.
Thumbnails are useful for performing whole-page operations. An alternative is to use Document Assembly which, in addition, allows objects or text to be selected inside pages to be moved or copied to other pages or even other documents.