Edit Bar controls: none
This tool is very similar to View - Extents, except that it zooms in to the extents of the current block. If you are not in a block then the extents of the layer are used.
NOTE: The block extents are defined by invisible, as well as visible, entities.
NOTE: Within a 3D layer, the Block Extents tool can be used to view the extents of a selected component.
Related topics: Notes On View Tools