Apart from turning off the display, what else can the power button do in Windows 10 computer? FYI, you can press it to hibernate or shut down your PC. As for how to achieve the goal, find the operation method in the following part.
Video guide on how to change power button setting in Windows 10:
Step 1: Get into Power Options.
Step 2: Click Choose what the power button does to move on.
Step 3: Under Power button settings, tap the setting bar, choose an option (e.g. Hibernate, Shut down, Do nothing or Turn off the display), and then hit Save changes.