You can use the Rescale…  command from the Geometry menu to rescale the selected joints in the Frame window.  This command is useful for investigating structural alternatives where you may wish to change the overall aspect ratio of a structure or part of a structure.

§    Select the part of the structure to be rescaled

§    Choose Rescale… from the Geometry menu

A dialog box will appear with the scaling factors in each of the axis directions.

§    Enter the scaling factors for the x, y and z directions

§    Click the OK button

Rescaling is done relative to the origin of the axes, so you may wish to use the Move… command to move the origin prior to rescaling, to ensure that rescaling occurs from the correct point.  Coordinates are rescaled by multiplying their value by the scaling factor.  For example, a joint with coordinates x=2, y=2, z=2 and rescaled using scale factors of 1.5, 2.0 and 3.0 for the x, y and z directions respectively, would move to the new location of x=3, y=4, z=6.

Using a scaling factor of -1 will reflect the selected joints about the appropriate axis.

Multiframe will not create a connection between joints that you superimpose on top of each other using this command.