Sindoh M611 - Manual (Page 142)

Settings and Changes of Each Function
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2. Paper Settings
You can select paper settings including the trays to use for print or copy jobs.
Paper Settings
1 Press 【Menu】 button.
2 Press 【Settings】 and 【OK】.
3 Press 【▲】 or 【▼】 to go to the wanted item, and then press 【OK】.
4 Press 【▲】 or 【▼】 to move to the item you want, and then press 【OK】.
5 After completing the settings, press Function button to exit to the Function window.