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Now, choose the Paper/Output tab. In the Paper: textbox, if the first setting is "-Mixed Size Output", then you won't be able to change the duplex (2-Sided) setting, so we'll fix the Paper size first: using the big dropdown button next to Paper:, choose Other Size..., then from the Output Paper Size: dropdown, choose Letter, then OK. Once the Paper: textbox no longer says "Mixed Size Output", you have the option to change the duplex default, under 2-Sided Printing, choose 2-Sided Print. It is appropriate to set duplex as the defaults default for all SCIC printers, and for any other printers printer whose Comments textbox on the General tab ends with a notation that this printer should be set to duplex by default. (That choice was made by the printer operator.)
Another choice made by the printer operator is for color devices, whether the default output should be color or black and white. If the operator prefers this print queue to default to black and white, that will be noted at the end of the Comments textbox on the General tab. (Sometimes, there will be a BLDGRoom-Model queue for b&w, and another BLDGRoom-Color-Model queue for color printing.) You set this under the Printing Defaults on the Color Options tab, which normally defaults to Automatic Color (Recommended) for color-capable devices.
The second place you have to check/set all these printer defaults is the Printing Preferences button on the General tab. These should now match what you set as the Printer Defaults form the Advanced tab; if not, fix them.
(Not yet finished)
SCIC printers, and other printers as documented in the Comment on the General tab: Duplex is on by default,