Can you post a DXF?

I can't reproduce this. Can you post your file?

AFAIK only 2D DXF/DWG elements can be imported.

Fixing this is relatively easy: instead of changing the placement of the 'Roof', change the placement of the underlying sketch. The same approach that was used for 'Roof holes'. I am inclined to call what you are seeing a bug. You could argue that the Z of the 'Roof' logically has an impact on neste...

Changing the radius works fine in my test. But you have to recompute. OS: Windows 8.1 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.16028 (Git) Build type: Release Branch: master Hash: 9079de7516eca945587e18f6076ec74eb7bd043c Python version: 2.7.14 Qt version: 4.8.7 Coin version...

For the GIF animation I have used ShareX . I am using the BIM workbench because BIM is my main reason for looking at FreeCAD. The BIM WB is an extension of the Arch WB, combining its tools with tools from other WBs. But I am just starting out with FC, so I cannot say what would best suit your workfl...

OK, after some (limited) testing I think the Reextrude tool tries to create a single extrusion from the selected face that fits inside the original shape. Thanks for pointing this out.
I wonder if the icon colors are correct. The 'normal' extrude tool should perhaps have the yellow icon?

Aha, I now understand that I have misunderstood the issue from the start. In my defense: the tool is called Arch_Remove and, coming from a dwg-CAD background, for me the word 'subtract' points to a boolean operation. But you are right: the Arch_Remove tool does not perform as described. It seems the...

BTW:
I find it strange, contrary to what you would expect(?), that a newly opened document can be in a state where a recalculation has to take place.

Two suggestions:

1. Keep the 2p rectangle and modify the Explode tool so that it first turns a 2p rect into a 4p rect.
2. Keep the 2p rectangle and create a separate tool for a 4p rect.