To Automatically Cleanup Dimensions
Use this procedure to simultaneously:
• Clean dimensions by view, or by individual dimensions.
• Center dimensions between witness lines (including the entire text box with gtols, diameter symbols, tolerances, and so on).
• Create breaks in witness lines where they intersect other witness lines or draft entities.
• Place all dimensions on one side of a model edge, datum plane, view edge, axis, or snap line.
• Flip arrows.
• Offset dimensions from edges or view boundaries.
1. On the Annotate tab, click 
Cleanup Dimensions. The Clean Dimensions dialog box opens but is not active.
Cleanup Dimensions. The Clean Dimensions dialog box opens but is not active.2. Select individual or multiple dimensions or an entire view; then click OK. The Clean Dimensions dialog box activates.
3. Click the Placement tab to modify the placement of dimensions and detailing items:
◦ Type an initial uniform offset value in the Offset box. To place the selected dimensions, type an incremental offset value in the Increment box.
◦ In the Placement page, do one of the following:
▪ Select View outline to offset the dimensions with respect to their view outlines.
▪ Select Baseline to reposition only dimensions in the same view whose leaders are parallel to the selected baseline.
◦ Select one of the entities in the drop down list to use as a cleaning baseline. An arrow appears to indicate the offset direction. To change the direction click Flip arrow.
◦ Check Create snap lines to add dashed snap lines to the dimensions.
◦ Check Break witness lines to break witness lines where they intersect other witness lines.
◦ Click Apply. The system applies cosmetic cleanups to all dimensions. Click Undo to return them to their pre-cleaned state and try again without re-selecting dimensions.
4. Click the Cosmetic tab.
◦ By default, the system selects all of the check boxes. Clear any or all of them, as necessary; then click Apply:
▪ Flip arrows flips the arrows inside the witness lines if they fit (without overlapping the text); if they do not fit or they would be overlapping the text, they flip outside the witness lines.
▪ Center text centers the text of each dimension between its witness lines. If it does not fit, the system moves the text outside the witness lines in the specified direction:
▪ Horizontal moves the text to the left or right.
▪ Vertical moves text of vertical dimensions up or down.
◦ Create snap lines creates snap lines under all moved dimensions (if the destination does not already have a snap line in the vicinity). They appear only under dimensions that are parallel to baselines (if you have selected a baseline) or parallel to a view border (if the view outline has been selected). Once you clear this check box, it remains cleared for the remainder of the current session.