To clean up your 2D linework, select all the lines, go to Edit > Reshape > Linework Consolidation. . . This activates the Linework Consolidation Wizard which takes you through steps to clean up your 2D lines. Very handy for cleaning up imported 2D Details or Survey Drawings.
Have you ever looked at a project with loads of 2D fills and wanted to tidy them? This can happen particularly when you copy paste from coloured sections or elevations. It would be much easier to manage and manipulate this type of data if the elements were tidied up in to fewer elements. The good
Have you ever imported 2D data from a dwg or dxf only to find there are loads and loads of individual lines? It would be much easier to manage and manipulate this type of data if the elements were tidied up. The good news is that ArchiCAD has a tool specifically for this job. First
When using the Linework Consolidation Wizard it will ignore Grouped lines. This is great if you need to keep the integrity of a certain set of lines.