To Set the Dimension Scale for Model Space Dimensions in Layouts
Click
Home tab
Annotation panel
Dimension Style
.
Find
In the Dimension Style Manager, select the style you want to change. Click Modify.
In Modify Dimension Style dialog box, Fit tab, under Scale for Dimension Features, select Scale Dimension to Layout (Paper space).
Click OK.
Click Close to exit the Dimension Style Manager.
Related Concepts
About Setting the Scale for Dimensions
Related Reference
Commands for Dimension Scales