This article explains how to restart a Samsung Galaxy Watch.
How to Perform a HARD RESET on Your Samsung Galaxy Watch 4 – If You Can't Access Your Watch
If your Samsung Galaxy Watch is acting weird and you need to restart it, you have two options. You can either power it off via the on-screen menus or force it to restart via the physical buttons. Here’s how to restart your Galaxy Watch via the menus:
Swipe down from the main watch face.
To turn the Galaxy Watch back on, press and hold the physical Home button. You can release when the screen turns on.
