Canon iR3245 Manual page 148

If [Erase Single Page] is selected:
2
Select the page to be erased using [-] and [+].
You can check image stored in the document you have selected by pressing [View Page].
(See "Checking an Image in a Document(p.2-74).")
If [Erase Pages Consecutively] is selected:
2-82 Erasing Part of a Document