Edit the mark dimensions, line style, color, and placement details. You can also set the default dimensions on the Marks tab in the Preferences dialog box. 

Size

Select a size type, and specify the mark's fixed or variable dimensions.

• If you select Fixed, specify the mark's Width and Height.
• If you select Height is variable, specify the fixed Width for a vertical rectangle.
• If you select Width is variable, specify the fixed Height for a horizontal rectangle.

Note: Set the default dimensions on the Marks tab in the Preferences dialog box.

Style

Select the line type (solid, dotted, or dashed).

Anchor

For fixed-size marks, you can choose any of the nine points in the Anchor to diagram, and then specify any vertical and horizontal offsets to be applied to the selected anchor point.
For variable-sized marks, the anchor points are selectable vertical or horizontal lines, corresponding to the selected Size centered option.

• For variable height marks, you can apply a horizontal offset and specify how much vertical margin to allow. (Applying a vertical margin shortens the mark's height.)
• For variable width marks, the opposite applies.

Horizontal, Vertical

Type the amounts of horizontal and vertical space to allow between the mark and component anchor points.