I just installed ambient lights for front and rear footwell. Looks cool. I made it not too bright, not too dark.
I used side-glow fiber optic. I stick one end to led bulb, and leave the other end empty. That way, as I run the fiber optic under the foot well, the light will spread equally. The empty end of the fiber optic is still as bright as the original led, so I pointed it to the wall and the light will spread out.
On the head unit, click the gear icon, then home screen. You'll see either 2 or 3 panes (and the option to switch) and it will tell you what is displayed in each of the panes (e.g. phone, audio, weather). Tap any one of the 2 or 3 panes and you'll bring up a list of things you can display like the clock, the eco app, or navigation.
What year and trim level is your Camry?
I can see where to change it in my Home settings but CLOCK is not listed as an option, just a couple of other items.
I have a '15 XLE.