Hyper V Screen Resolution too Small

I have created a Windows 7 VM in Hyper V.

When I open it with the Hyper V console, the screen is way too small and the VM is unreadable because it's all too small. I have set it to be 800×600 but that just makes the window tiny and not the desktop bigger.

Then I tried to RDP into it but that's worse. Now the screen takes the whole of the hosts screen but the desktop is still way too small to read.

I have also tried mstsc /c:VM1 /w:800 /h:600 but it only creates a small window and the desktop is still too small to read.

I have turned off "Allow enhanced session mode" and that had no effect.

I would like to know how to get the resolution to be say 800×600 and have it appear big on my desktop screen and not in miniature.

Any help would be great.