Yes - when you open your BRYTE app, select the icon that looks like a thermometer. You should see four options: max cool, cool, warm, max warm. Depending on which option you select, your bed will begin warming or cooling at different levels.
You can shut off the warming or cooling manually, or it will automatically shut off two hours from when you turned it on. If you used this feature during the prewarm, precool, or overnight functionality your bed will resume whatever function was running when the temperature was chosen. The video below walks you through the temperature process.