If you select a block in a drawing and enter -bedit at the Command prompt, the selected block is opened in the Block Editor. If nothing is selected, the following prompt is displayed:
The following prompts are displayed
Enter block name or [?]: Enter a name or ?
Specifies the name of a block saved in the current drawing to open in the Block Editor or specifies the name of a new block to create.
Lists the block names in the text window.
Enter block(s) to list <*>: Enter a name list or press Enter