Epson WorkForce Pro WF-C8690 A3 Color MFP with PCL/PostScript - Manual (Page 96)

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Loading Paper
Before you print, load paper for the type of printing you will do.
Loading Paper in the Cassette
Loading Paper and Envelopes in the Rear Paper Feed Slot
Paper Loading Capacity
Double-sided Printing Paper Types
Available Epson Papers
Paper or Media Type Settings - Printing Software
Selecting the Paper Settings for Each Source - Control Panel
Selecting Default Paper Settings - Administrator
Loading Paper in the Cassette
You can load paper up to this size in the paper cassette: A3 (11.7 × 16.5 inches [297 × 420 mm])
Note: If the optional paper cassette units are installed, do not remove more than one cassette at a time.
1. Make sure the product is not operating and pull out the paper cassette.