Press Menu/Press Menu/ scroll across top menu tabs to Set up tab/scroll down to Advanced mode/select(right arrow) Now more options will appear.
While in the same window/menu scroll down to Readouts.
Scroll through and select the desired readouts I think there are 4 or 5 readout boxes available. She will see a menu for each readout of many things and not limited too: Temp/time/depth/volts/datetime/etc…
She can select a readout type for each overlay or just turn on the ones she wants.
I have found it best to turn on overlays after that step. The readouts will appear in translucent boxes and are easier to see but do cover a bit of the screen.
The newly selected Temp readout should be on the left hand side of the screen with all the other readouts she selected.
Who do I send the invoice too? HA!