Dimension in model space for printing or plotting in paper space.For example, if the plot scale is 1/4, set DIMSCALE to 4. To create dimensions that are scaled correctly for printing or plotting, set the DIMSCALE system variable to the inverse of the intended plot scale. This is the traditional method used with single-view drawings. Dimension in model space for plotting in model space.There are three methods used to create dimensions in a drawing layout: Setting dimension scale depends on how you lay out your drawing. When you create annotative dimensions, they are scaled based on the current annotation scale setting and automatically displayed at the correct size. Note: You can use annotative scaling to control the overall scale of dimensions displayed in layout viewports.