Standard Configuration - Epson EPL-N7000 Reference Manual

Access the printer driver, click the Basic Settings tab, and
select the paper source that you want to use from the Paper
Source list. Then click OK.
Using the printer's control panel
Access the control panel's Setup Menu, then select Paper
Source and specify the paper source you want to use. See
"Setup Menu" on page 404 for more information.
Auto selection
If you want the printer to select the paper source containing the
appropriate size of paper automatically, select Auto Selection in
the printer driver or Auto using the printer's control panel.
The printer will search for a paper source containing the specified
paper size in the following order.

Standard configuration:

MP Tray
Lower Cassette 1
Note:
If you make paper size settings or paper source settings in your
application, these settings may override the printer driver settings.
If you select an envelope for the Paper Size setting, it can be fed only
from the MP tray regardless of the Paper Source setting.
You can change the priority of the MP tray by using the MP Mode
setting in the control panel's Setup Menu. For details, see "Setup
Menu" on page 404.
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Paper Handling