In order to to do this, you must first be in Biotech Mode, then: Place the thermometer in the wall holder (Model 692 Only) Press and hold the Recall button, while removing the probe from the probe well. Once the probe is removed, release the Recall button. Press and release the Recall button until Default Mode is displayed in the upper left corner of screen To change between the Oral, Adult Axillary and Pediatric Axillary modes, press and release the Mode Selection button. Observe that the display changes between ORAL, ADULT AXILLARY and PED AXILLARY when the Mode button is pressed. Replace the probe into the probe well to save default setting, then exit the Biotech mode. This will return the unit to normal operation.