To View Properties of a Block Definition (Block Editor)
Click
Insert tab
Block Definition panel
Block Editor
.
In the Edit Block Definition dialog box, do one of the following:
Select a block definition from the list.
Select <Current Drawing> if the drawing is the block definition you want to open.
Click OK.
If the Properties palette is not displayed, select any object. Right-click the object and select Properties.
In the Properties palette, under Block, view the properties of the block definition.