Galaxy Z TriFold: How to Automatically Start DeX Mode

Quick summary: The Galaxy Z TriFold can run Samsung DeX right on its big inner screen, no monitor needed. Apps open in resizable windows like a desktop. Here’s how to start DeX manually, and how to make it turn on automatically every time you fully open the phone.

Start DeX manually

Swipe down to open the quick panel, swipe over to the DeX tile and tap it. Apps now open in small windows you can move and resize, like a desktop operating system.

Make DeX start automatically

1. Open Settings > Modes and Routines.
2. Scroll down and tap Add mode.
3. Give it a name (I called mine “DeX”), pick a color if you want, and tap Done.
4. Under Turn on automatically, tap Add condition.
5. Choose Folding status > Completely open and tap Done, then Done again.
6. Scroll down to Other actions and tap to add an action.
7. Search for DeX (or scroll the list), tap it, turn it on and tap Done.

Try it

Close the phone and open an app (I opened YouTube). When you unfold it completely, you’ll see a message that DeX has turned on. There’s a slight delay, then it switches to the desktop, and apps like YouTube, the Play Store and X open in DeX windows. To leave DeX, close it from the desktop like normal.

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