To Update a Block Definition | AutoCAD for Mac 2020 - Autodesk
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To Update a Block Definition That Originated from a Library Drawing Open the library drawing and use the Block Editor to modify the block as needed, and save. If the Blocks palette isn't open, click Window menu > Blocks. Click Block Libraries. Select the library that you modified previously. Select the block you modified, right-click, and select Insert in Drawing. In the Block - Redefine Block dialog box, click Redefine Block.
Open the library drawing and use the Block Editor to modify the block as needed, and save.
If the Blocks palette isn't open, click Window menu > Blocks.
Click Block Libraries.
Select the library that you modified previously.
Select the block you modified, right-click, and select Insert in Drawing.
In the Block - Redefine Block dialog box, click Redefine Block.
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