How to Scale Dimensions Without loosing Original Value

Im working in 1:1, putting dimensions of what things measure in real life.

I then want to scale my model 1:500 for printing. Dimensions re measure the distance and thus change the original value. Also, the dimension lines, arrows, text etc do not addapt properly to the scaling, not maintaining proportions (see screenshots)

How can I solve this?
Thank you

Don’t scale the model - scale the printing parameters. You can print the full sized model at 1:500 scale, either directly from the model viewports, or from a layout. For best control over printing in Rhino, use layouts.