1. make a 0,5 high window, 0,4 over the floor level.
2. place the switch texture on it and choose insertion, or whatever it is.
-assign a tag.
3. make a platform with that tag.
4. place a chip or spht keycard on the level.
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The problem in your map is probaly that the platform is not functional or
that the window is to high.
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With the program Hex you can make terminal text for marathon and assign
tags at different points in the terminal. If you dont have the editor, download it from the archives. I know you will be pleased.
-goran "creator of the yota saga"