What is the primary purpose of the "DIMSCALE" command in AutoCAD?

The primary purpose of the "DIMSCALE" command in AutoCAD is to set the scale factor for dimensioning. This command allows users to adjust the size of the dimension text, arrows, and other dimension features in relation to the scale of the drawing. When working with different scale factors in architectural and engineering drawings, it is essential to have dimensions that are visually proportionate to the objects they are measuring. By adjusting the DIMSCALE, users ensure that the dimensions are clearly legible and fit within the appropriate context of the drawing, thus maintaining the accuracy and professionalism of the presentation.

The other options do not accurately represent the function of the DIMSCALE command. Changing the color of dimensions relates to modifying the appearance settings, creating a new dimension style involves setting unique dimension parameters, and hiding dimensions pertains to visibility settings in the drawing, none of which correlate with the scale factor adjustment that DIMSCALE specifically addresses.