https://community.graphisoft.com/t5/Installation-update/Logitech-Trackball/m-p/195055#M20846 I had the same problem with my mouse a long time ago, I think I had to go into the mouse settings and make sure that the scroll wheel was set to middle click Thu, 26 Mar 2009 21:35:45 GMT Anonymous 2009-03-26T21:35:45Z https://community.graphisoft.com/t5/Installation-update/Logitech-Trackball/m-p/195054#M20845 <DIV class="actalk-migrated-content"><T>I'm hoping to find a fellow ArchiCAD user that knows the trackball well.<BR /> I use a trackball and find it very efficient but it appears I've altered the function of the scroll wheel and can't figure out how to restore it to its original function.<BR /> Before I could hold the wheel down and it was programmed to activate the Pan command, but while continuing to hold it down it allowed me to Pan, now depressing the wheel activates the Pan command but to perform the pan, I must release the wheel and click on the screen then Pan - the original way was so much easier.<BR /> <BR /> Thanks<BR /> Ed-Rab<BR /> Mac Book Pro, Leopard 10.5.6, 2.5 GHz, Intel Core 2 Duo, 4GB, ArchiCAD v10</T></DIV> Wed, 18 Mar 2009 15:35:29 GMT https://community.graphisoft.com/t5/Installation-update/Logitech-Trackball/m-p/195054#M20845 Anonymous 2009-03-18T15:35:29Z https://community.graphisoft.com/t5/Installation-update/Logitech-Trackball/m-p/195055#M20846 I had the same problem with my mouse a long time ago, I think I had to go into the mouse settings and make sure that the scroll wheel was set to middle click Thu, 26 Mar 2009 21:35:45 GMT https://community.graphisoft.com/t5/Installation-update/Logitech-Trackball/m-p/195055#M20846 Anonymous 2009-03-26T21:35:45Z