Obviously it is not recommended to walk away from your glowforge when its in use. However I know there are many here that do it, weather in the next room over or another room. If your going to walk away from it regardless. I’d recommend spending the $25 on a wyze cam for live stream view to your phone. That way even if you are still in the same room as the Glowforge and don’t feel like bending over the machine the entire 3 hours you can view it live at a better angle too. I am so glad to find this, however if your going to stay in and watch it at all times then disregard this. I have seen to many people having fires from leaving it unattended.
Here’s my review and walkthrough of what it looks like when using it live with Glowforge: