The beginning part of this video I'll show you how to download and save a block.

To redefine a block there is a handy tool in MechQ that will handle this quite effectively.

To jump to how to create a Tool Palette of blocks, see:    • How to create, edit and add blocks to...  

Im using AViCAD, an Acad alternative check that out here:

cadavenue.com/avicad.htm

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