OK, here we go.
1. Make the sector you want to be your door. Give it the same floor height as the celing height.
2. Create the sector you want to be the switch, do whatever you want with it. Give it the sector type: "Linedef executer (floor touch)" or "Linedef executer (no floor touch)"
3. Create one control sector, this is all you will need.
4. Set the proporties of one linedef in that sector to "trigger linedef exectuer (once)" Tag it the same tag as the button sector.
5. Set the proporties of another linedef in the control sector. Set it to "set floor height". Give it the same tag as the door sector.
6. Set the proporties of the control sector. Set the floor height to whatever you want the door to be at once it's opened.
7. Test the map, it should work. If not read through the guide a few more times to make sure you didn't mess up.
1. Make the sector you want to be your door. Give it the same floor height as the celing height.
2. Create the sector you want to be the switch, do whatever you want with it. Give it the sector type: "Linedef executer (floor touch)" or "Linedef executer (no floor touch)"
3. Create one control sector, this is all you will need.
4. Set the proporties of one linedef in that sector to "trigger linedef exectuer (once)" Tag it the same tag as the button sector.
5. Set the proporties of another linedef in the control sector. Set it to "set floor height". Give it the same tag as the door sector.
6. Set the proporties of the control sector. Set the floor height to whatever you want the door to be at once it's opened.
7. Test the map, it should work. If not read through the guide a few more times to make sure you didn't mess up.