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Possible Duplicate:
Turning on Aerial Faith Plate trajectory display?

I want to see the trajectory lines mentioned in developers commentary (youtube link) in Portal 2; developers used them to debug application. I was able to enable a console.

I apologize but I found answer while typing this. The answer is to type "enable_debug_overlays 1".

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marked as duplicate by Mad Scientist, Matthew Read, Raven Dreamer, Grace Note Jun 21 '11 at 19:26

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Could someone please add these tags "developers-commentary trajectory debug", they might be handy, only if You want them there, thanks. :) – user712092 Jun 21 '11 at 18:35
Please don't mark your question as "Solved" in the title. Instead, please post the answer as an answer using the Answer field below. – Grace Note Jun 21 '11 at 18:37
I edited it. I just found out I can't answer my own questions yet ... after 7-8 hours I can do it. :) – user712092 Jun 21 '11 at 18:39
@lunboks It's useful knowledge, it should just be posted as a self-answer like Grace Note said – Michael Mrozek Jun 21 '11 at 18:51
up vote 4 down vote accepted

Type enable_debug_overlays 1 in the console to enable the trajectory lines.

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