Hi @Anonymous,
BLOCKICON is the command generates preview images for blocks displayed in DesignCenter.
Simply type it in and select the wildcard (*)
then if you save the drawing you should be able to access it using Design Center with all of the block icons visible.
If you have a sample library file with your blocks in it I would be happy to take a look and maybe make a video for you.
Please select the Accept as Solution button if my post fully solves your issue or answers your question.
John Vellek
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