Canon imagePROGRAF GP-300 - Manual (Page 426)

Set a Custom Size Roll Width
By specifying the roll paper width with a value, you can use roll paper with a width that cannot be selected in
Roll Paper Width .
The procedure for setting custom size roll width is described below.
1. Select Quality & Media from the pop-up menu of the Print Dialog 1.
2. Select the paper source 2.
Select Roll Paper for Paper Source .
3. Select Page Processing from the pop-up menu 3.
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