The Remote Desktop Protocol version 10.0, which is already available in Windows 10 Preview and Windows Server Technical Preview. If you open up the mstsc client you’ll see “Remote Desktop Protocol 10.0 supported”
A new feature of RDP 10.0 client is the option to zoom. If you’ve worked with RDP 8 you might be familiar with the option AutoSize with allowed you to switch between full screen and a sizeable window of you RDP session without having to logoff / logon. In RDP 10 to option to zoom is added.
The zoom option is a solution for a typical problem when using a hiDPI client to connect to an “older” version of Windows, for example Windows7. For example if you would be working in a Windows Surface with 2560x1440 you would generally set if to 150% DPI locally. If you would then open a RDP session to Windows7, that remote session does not automatically adjust its DPI setting to match the local DPI (where Windows 8 does). This results in a DPI of 100% and thus everything within the remote session look very small and less easy to read. With the zoom option to could overcome this. By setting a zoom level the RDP session will be stretched.
To enable the zoom option, click on the RDP icon of your RDP session (switch out of full screen mode). There you have the option to set a fixed zoom percentage.
For example, here is a session towards Windows 7 machine, left is normal more, right is 150% zoom mode.
Now because this is not done on the host side the result will not be crisp & clear. But the idea of this is to be a workable workaround when connecting to older operating systems. When connecting to Windows 8 and beyond, this is not an issue anymore because those session will be able to pick up on the local DPI setting and match that setting in the session.