Selecting and deleting pages in the Page Thumbnails pane
To select Page thumbnails
On the Desktop ribbon, click Thumbnail.
Use the Shift key to select neighboring pages, use the Ctrl key for non-neighboring pages. Use <Ctrl A> to select All pages.
Selection is indicated by a blue box.
To delete pages in the Page Thumbnails pane
Select the pages to be deleted.
Right-click and select Delete Selection from the shortcut menu
— or —
press the Del key.
Click Yes in the message box to confirm deletion.
The pages will be physically deleted.