https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137240#M73465 You could also customize what the trace reference shows, in it's settings dialog, turn off everything non-essential. Sun, 24 May 2009 20:24:20 GMT Thomas Holm 2009-05-24T20:24:20Z https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137236#M73461 <DIV class="actalk-migrated-content"><T>Hi, dose anybody knows why when I turn my trace reference on the computer became very, very slow.<BR /> Thanks</T></DIV> Fri, 22 May 2009 22:09:49 GMT https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137236#M73461 Anonymous 2009-05-22T22:09:49Z https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137237#M73462 Select your trace reference from the Navigator's Project map, not the view or layout map. This way Archicad doesn't have to deal with different layer combos simultaneously, which speeds up things a bit. Fri, 22 May 2009 22:31:28 GMT https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137237#M73462 Thomas Holm 2009-05-22T22:31:28Z https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137238#M73463 I also found it to be a lot slower in AC 11 than AC 12 - not that it helps your problem but if/when you upgrade you could see a boost in performance. Fri, 22 May 2009 23:06:45 GMT https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137238#M73463 Erich 2009-05-22T23:06:45Z https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137239#M73464 Thank you for the tip. Sun, 24 May 2009 16:29:10 GMT https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137239#M73464 Anonymous 2009-05-24T16:29:10Z https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137240#M73465 You could also customize what the trace reference shows, in it's settings dialog, turn off everything non-essential. Sun, 24 May 2009 20:24:20 GMT https://community.graphisoft.com/t5/Modeling/Trace-Reference/m-p/137240#M73465 Thomas Holm 2009-05-24T20:24:20Z