Hey there!
What you need to do is first grab a pencil and some paper, and
1.) place your mouse where you'd like to have the portal in your map (make sure your screen is facing the direction you want the portal to face, as well).
2.) At the bottom of your screen you'll see some coordinates; Ex.) 234, 8678, 987; Yaw: 122
- Write down each of those coordinates on your paper. DON'T move the mouse until you've done this.
3.) Go to the first page in Map Maker, and then type in those coordinates where it says X, Y, Z, and Yaw, in the order that you wrote them.
4.) Click the little check box that says 'Portal'.
You should have a portal in your map, then. To test it, simply 'Test' your map and in-game you should see the portal there, as it doesn't show up in Map Maker.
