Affected Products:
Single-Function: CS820, CX820, CX825, CX860, C6160, XC6152, XC8155 and XC8160
Multifunction: CS820, CX820, CX825, CX860, C6160, XC6152, XC8155, XC6153, XC8160 and XC8163

Issue Description:
To print envelopes outside the supported sizes of 7.75, #9, #10, DL, C5 and B5, you will need to follow all the steps below.
ALL non-standard envelope sizes require the following printer and driver setting adjustments:
Tray 3 Size sensing – OFF
Tray 3 Paper size – Other Envelope
Creation and selection of a custom page size via driver and application
Note:
The envelope option requires thetray 3 position.

Solution:
Step 1: Turn 'OFF' tray 3 size sensing

Using the control panel, touch Settings > Device > Maintenance > Configuration Menu > Tray Configuration > Size Sensing > Tray 3 (Envelope Feeder).

Toggle the setting to OFF.

Save this setting by touching the Home button or Back button.
Step 2: Change paper size to 'Other Envelope'

Navigate to Settings > Paper > Tray Configuration > Paper Size/Type.

Scroll down to Tray 3 and select Other Envelope.

Again, touch the Home button or Back button to save.
Step 3: Configure the driver and application
See KB Article How to Create and Select Custom Size Forms or Paper Sizes in Windows for instructions that explain how to create custom size forms.
ENVELOPE NOTE: Make sure Paper Type is set to envelope.
Related Articles

Still Need Help?
Have the following available when calling Lexmark Technical Support;
Printer model(s)
Printer serial number
LEGACY ID: HO4123