This command erases a selected block from
the drawing.
Select Global Erase <BIFF> from the Block Manipulation Fly-out of the Macro Pull-down, or...
Type BIFF or BB on the command line
Select the block to erase.
Window Select the area to erase selected block definition, or type ALL at the command line to erase all instances of the block.
Right-click to globally erase the selected block and exit the command.