Canon imagePROGRAF iPF765 MFP M40 - Manual (Page 447)

3
Positioning your hands as shown, open the Roll Cover.
4
Holding the Roll Holder flange (a), rest the Roll Holder
shaft on the Roll Ledge (b).
At this time, position the holder so that the R label (c)
on the [W label (c) on the Roll Holder flange is aligned
with the R label (d) on the printer .
iPF765 Loading Rolls in the Printer
User's Guide
Handling Paper
Handling rolls
447