Blocks have a few special properties. When you select a block instance on the map, the properties palette displays the Block Properties section.
Block Name
Select a different block from the dropdown to change the selection to a different definition
Edit Block
Enables block edit mode
Scale
Uniformly scale the entire block by a percentage
Rotation
Rotate the block by degrees, around the block origin
Mirror
Mirror the block along the N/S axis by the block origin point
Base Height
A special version of base Heigh for blocks.
Forces the entire block to sit at the defined base height.
Base Heights defined within the block become relative.