Brother MFC J6910DW - Manual (Page 198)

USB cable scanning
191
12
Setting the new default (For Touchscreen models)
12
a
Press (SCAN).
b
Press d or c to choose to Media.
c
Press and choose your new setting. Repeat this step for each setting you want to change.
d
After changing the last setting, press d or c to choose Set New Default.
e
Press Yes.
f Press Stop/Exit.
Factory reset (For Touchscreen models)
12
a
Press (SCAN).
b Press d or c to choose to Media.
c Press d or c to choose Factory Reset.
d Press Yes.
e
Press Stop/Exit.