You can edit the position, size, and attributes of block instances. You cannot edit the block definition in Inventor. Open the drawing in AutoCAD to modify the block definition.
To edit block attributes, select a block, right-click, and click Edit AutoCAD Block. Then modify the attribute values in the AutoCAD Blocks dialog box.
To modify block properties, select a block, right-click, and click Properties. Then change Line Type, Line Weight, Color, and Scale.
To move, rotate, or resize a block, select a block in the graphics window to show its grip points.
Click a grip point, and do one:
You can open the current dwg file in AutoCAD in order to modify block definitions. AutoCAD must be installed on the computer.