Toolbar / Icon:
Add-on:
QCAD Professional
Menu: Block > Edit Block In-place
Shortcut: B, B
Commands: blockeditinplace | bb
With this tool a block can be edited at the location where it was inserted into the drawing. The block can be inserted uniformly scaled or rotated.
This may appear as if the contents of a block reference was being edited. This is not the case. It's important to keep in mind that it is the block definition that is being edited. Any changes made to the block will affect not only the block reference that is being edited but also all other block references that are using that same block.
Edit > Application Preferences > Graphics View > Behavior