https://community.graphisoft.com/t5/Modeling/Help-simple-problem/m-p/110496#M58311 In the "Floor Plan and Section" settings &gt; Change the Structure's &gt; "Cut Fill" to something other than a "Composite Structure".<BR /> <BR /> Also.... Try ArchiCAD-talk's search function..... you may find your answer without waiting for a reply <IMG src="https://community.graphisoft.com/legacyfs/online/emojis/icon_biggrin.gif" style="display : inline;" /> Wed, 02 Jan 2008 15:28:27 GMT Stress Co_ 2008-01-02T15:28:27Z https://community.graphisoft.com/t5/Modeling/Help-simple-problem/m-p/110495#M58310 <DIV class="actalk-migrated-content"><T>Hi i have a problem, and i think it is a really simple thing to fix.<BR /> <BR /> for example i can't change the thickness on the slab, it is automatical on 300, why is that? and how can i fix it?<BR /> The same problem is in the "roof default settings". I am unable to change the "Vertical Eves Height" and "Roof thickness".</T></DIV> Tue, 23 May 2023 13:14:16 GMT https://community.graphisoft.com/t5/Modeling/Help-simple-problem/m-p/110495#M58310 Anonymous 2023-05-23T13:14:16Z https://community.graphisoft.com/t5/Modeling/Help-simple-problem/m-p/110496#M58311 In the "Floor Plan and Section" settings &gt; Change the Structure's &gt; "Cut Fill" to something other than a "Composite Structure".<BR /> <BR /> Also.... Try ArchiCAD-talk's search function..... you may find your answer without waiting for a reply <IMG src="https://community.graphisoft.com/legacyfs/online/emojis/icon_biggrin.gif" style="display : inline;" /> Wed, 02 Jan 2008 15:28:27 GMT https://community.graphisoft.com/t5/Modeling/Help-simple-problem/m-p/110496#M58311 Stress Co_ 2008-01-02T15:28:27Z