Mark Ratio/Mark Segment Ratio/Mark Scale Factor

Marks the most recently selected ratio or scale factor as the ratio for future dilations. This command displays one of three related appearances, depending on your selections. If you select:

· two segments, the command becomes Mark Segment Ratio. Dilation will use the ratio of the length of the first segment to the length of the second segment.

· a measured or calculated scale factor, the command becomes Mark Scale Factor. The selected measurement or calculation must be a scalar value (that is, a value without units).

· three collinear points, the command becomes Mark Ratio. If you select points A, B, and C in order, dilation will use the ratio of signed distances AC/AB.

Use a dynamic marked ratio or scale factor when you want your dilated image to change as the marked item changes.

Dilations can use either a fixed ratio (such as ½) or a marked ratio (such as AC/AB). When you dilate by ½, the ratio of dilation never changes, but when you dilate by AC/AB, the dilation changes as the positions of points A, B, and C change.

Subtopics:
Marking a Ratio Using Two Segments
Marking a Scale Factor Using a Measurement, Parameter, or Calculation
Marking a Ratio Using Three Collinear Points