Bosch HBL3350UC - 300 Series, 30" Single Wall Oven Use And Care Manual page 18

To Change Settings:
The oven must be turned off with no timer running in order to access the "Customer
Settings" menu.
1. Press Temp for two seconds to access the Customer Settings menu.
The first menu item, CS1 = "Clock Mode", appears in the display:
2. Use the settings dial to set the desired value.
3. Confirm by pressing Timer.
The next menu item, CS2 = "Setting of Buzzer Duration", appears in the
display.
Always set the values as described in steps 2 and 3. Press Temp to leave the
menu.
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