Scaling up rhino on my monitor

I now have a 3840 x 2160 monitor and Rhino looks ok but I would like to scale it up. How could I tell Rhino to scale up and leave my other programs as is?

Is this V5 or V6?

V6 rhino

Generally, Rhino get’s it’s U/I size options from Windows.

The Options > Appearance page has an option for the font and size of the Command prompt.
Options > Toolbars > Size and Styles has a control for the size of the toolbar icons.
Options > View > Display modes > [named mode] has controls for how wide curves, isocurves, surface edges, etc appear on the screen.

What specifically are you trying to change?

That works thanks