How to change the markup of a WPF application at different resolutions?

Question

WPF

There is a .net 4.0 WPF application. The
task is to run it on a tablet with a low resolution, there is some way to adequately change the screen layout depending on the resolution, or only set the grid sizes in%.
In general, I don’t know which way to look, I want high-resolution controls to not be terribly large.