Customize Arrowheads

You can create your own custom arrowheads.

Arrowheads are stored as block definitions. To use your own arrowhead, provide the name of an existing block definition. For information about creating blocks, see Create Blocks Within a Drawing.

NoteAnnotative blocks cannot be used as custom arrowheads for dimensions or leaders.

Arrowhead sizing relies on the overall dimension scale factor. When you create a dimension, the block is inserted where the arrowheads would normally go. The object's X and Y scale factors are set to arrowhead size overall scale. The dimension line is trimmed by text gap x overall scale units at each end. To trim the dimension line, the rightmost block is inserted with a zero rotation angle for horizontal dimensioning. The leftmost block is rotated 180 degrees about its insertion point.

NoteThe insertion point a block is defined with affects its placement as a custom arrowhead on a dimension or leader. For information on changing the insertion point of a block, see Create Drawing Files for Use as Blocks.

If you use paper-space scaling, the scale factor is computed before applying it to the arrowhead size value.

To use your own arrowhead symbol
  1. Click Home tabAnnotation panelDimension Style. Enter dimstyle at the Command prompt.
  2. In the Dimension Style Manager, select the style you want to change. Click Modify.
  3. In the Dimension Style Manager, Symbols and Arrows tab, under Arrowheads, select User Arrow from the First arrowhead list.
  4. In the Select Custom Arrow Block dialog box, enter the name of your block. Click OK.
  5. To choose a different custom arrowhead for the second arrowhead, repeat steps 3 and 4, choosing User Arrow from the Second arrowhead list (optional).
  6. Click OK.
  7. Click Close to exit the Dimension Style Manager.

Creates a block definition from selected objects.


Creates and modifies dimension styles.


Saves selected objects or converts a block to a specified drawing file.

System Variables

Controls the size of dimension line and leader line arrowheads.


Sets the arrowhead block displayed at the ends of dimension lines.


Sets the arrowhead for the first end of the dimension line when DIMSAH is on.


Sets the arrowhead for the second end of the dimension line when DIMSAH is on.


Assigns colors to dimension lines, arrowheads, and dimension leader lines.


Sets the distance the dimension line extends beyond the extension line when oblique strokes are drawn instead of arrowheads.


Controls the display of dimension line arrowhead blocks.


Specifies the size of oblique strokes drawn instead of arrowheads for linear, radius, and diameter dimensioning.