Games : How to read map triggers in Descent 1 and 2?

Could you recommend me how can I read map triggers for Descent 1 and 2?

I have tried DLE – Descent Level Editor 1.12.4 but it seems to be crashing whenever I click Wall tab so I cannot get to trigger opening door. Tested with Descent 1 Level 2.

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  Which editor are you using to learn map logic?

  
  


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  When editing the map in that editor, how can I find trigger bound to selected door?