Dimension command enhancements

DIM command is more effective with Object Snap turn off
Annotate tab > Dimensions panel > Dimension

Dimensions created by the DIM command are automatically placed on the specified layer

DIM command automatically creates appropriate dimensions based on the selected object types
Select horizontal or vertical line - Linear
Select line other than horizontal and vertical - Aligned
Select an arc - Radius
Select a circle - Diameter
Select 2 lines which are not parallel - Angular