To Create a Baseline Dimension

  1. Click Annotate tabDimensions panelBaseline. Find

    By default, the origin of the last linear or angular dimension created is used as the first extension line for the new baseline dimension. You are prompted for the second dimension line.

  2. Use an object snap to select the second extension line origin, or press Enter to select any dimension as the base dimension.

    The second dimension line is automatically located at the distance specified by the Baseline Spacing option in the Dimension Style Manager, Lines tab.

  3. Use an object snap to specify the next extension line origin.
  4. Continue to select extension line origins as needed.
  5. Press Enter twice to end the command.