Canon imagePROGRAF GP-4000 - Manual (Page 124)

Specifying Amount of Extension for Paper of sufficient width.
In case of Paper of sufficient width , the width of the original is set to be slightly smaller than the paper,
and there are margins on the left and right. You can reduce the margins by increasing the amount of
extension.
On the other hand, if the amount of extension is too large, the back side of the paper will be easily soiled
with the overflowed ink. When performing borderless printing with specifying the amount of extension for
Paper of sufficient width , clean the platen regularly.
Cleaning Inside the Top Cover
1. Tap paper setting display area on HOME screen. 1.
2. Tap area. 2.
3. Tap Paper settings . 3.
4. Tap Advanced . 4.
5. Tap Extension for borderless printing . 5.
6. Tap Paper of sufficient width . 6.
7. Tap Sample of extension amounts . 7.
8. Confirm displayed message and tap Yes . 8.
The alignment pattern for each adjustment value is printed.
9. Select the adjustment value. 9.
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