Change scale of dimensioned detail in layout


I created this detail for a concrete stair. I did all the dimensioning in the layout which is as far as I know the correct way to do it. Now I am thinking about changing the layout so I would end up with:

1. a smaller version of the current drawing ( original scale is 1:6 new would be 1:8)

2. an additional detail of one of the steps in a 1:3 scale.

Is there anyway to do this in an efficient manner without the need to redo the entire dimensioning?

Thank you for any feedback

Andreas

In the layout run the ChangeSpace command and select your Dimensions, then the viewport.