https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287952#M148817 <DIV class="actalk-migrated-content"><T>I have problem to show up the blue control line in OpenGL Engine but if I switch to Vectorial Engine, I can see the blue control line. Can someone solve this problem? Please refer to attached images. Thanks.</T></DIV> Tue, 01 May 2018 23:45:21 GMT Anonymous 2018-05-01T23:45:21Z https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287952#M148817 <DIV class="actalk-migrated-content"><T>I have problem to show up the blue control line in OpenGL Engine but if I switch to Vectorial Engine, I can see the blue control line. Can someone solve this problem? Please refer to attached images. Thanks.</T></DIV> Tue, 01 May 2018 23:45:21 GMT https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287952#M148817 Anonymous 2018-05-01T23:45:21Z https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287953#M148818 I am not aware of any settings specifically for OpenGL.<BR /> There is a Work Environment settings to show selection contours and reference lines, but this affects OpenGl and Vectorial engines.<BR /> <BR /> I would check that you have the latest video card drivers installed.<BR /> <BR /> Barry. Wed, 02 May 2018 00:26:38 GMT https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287953#M148818 Barry Kelly 2018-05-02T00:26:38Z https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287954#M148819 Hi Barry, thanks for your reply. I haven't found the right answer for this problem, but I have a solution here. I saved as the model to AC 20 and re-open in AC 21, I don't have this issue anymore. I guess this may cause by the railing and stair tools as they don't show up in the new model. Tue, 12 Jun 2018 01:19:02 GMT https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287954#M148819 Anonymous 2018-06-12T01:19:02Z https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287955#M148820 Railings and stairs would have been deleted when you saved back to 20 as those tools don't exist in 20 and can't be replicated - so they just get deleted.<BR /> I doubt it was anything to do with them.<BR /> <BR /> Sounds like it was just a glitch that got reset when saving back.<BR /> I still have no idea what it could have been.<BR /> <BR /> Barry. Tue, 12 Jun 2018 01:34:56 GMT https://community.graphisoft.com/t5/Modeling/Control-line-doesn-t-show-up-in-3D-view/m-p/287955#M148820 Barry Kelly 2018-06-12T01:34:56Z