Gordon girl,
It would help to know what year your Highlander is?
If it is a 2008 or newer, there is a "Disp" button on the right senter edge of the steering wheel (just above the "voice" button).
* Press and hold this button for 5 seconds and a menu will pop up on the small MFD screen just above the NAV screen.
* There are several options from which to choose, but "clock" should be the first one.
* Press and hold the "Disp" button again to go into setting the clock mode. You will be able to set the clock from that screen.
Please also point your browser to
www.toyotaiguide.com to find out some additional information about the Highlander. It has an on-line manual that will step you through most of the things that you are wanting to discover. Although it's not the same as having a "paper" manual, it does provide a method to read up on your vehicle.
Go to "iGuide Resources"
Select "Owners Manual"
Select "Section 2: When Driving"
Go to page 193 for setting the clock.
Hope this helps.