Use the FlipArrows command to change the position of dimension arrows.
You can apply the tool to any Dimensions that use arrows or ticks.
When you select Dimensions, a node () displays near dimension arrows or ticks. Clicking a node flips the arrows of the Dimension.
To flip dimension arrows:
The dimension arrows or ticks flip around the extension line or entity edge.
To flip dimension arrows with dimension grips:
Use the DimensionStyle command to set the style and size of dimension arrows.
Access
Command: FlipArrows
Menu: Dimension > Edit > Flip Arrows