Surface Pro 4 (Windows 10) - Remote desktop, other programs appear too small

Here is what I did to solve the issue.  It also works with older apps that don't handle high dpi scaling well.

First one must tell Windows to look for a manifest file for an application by default – a registry entry. 

Next is to provide a manifest file for a given application – the executable file name followed by .manifest.

Open regedit and navigate to the registry key:

HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > SideBySide

Right-click, select NEW > DWORD (32 bit) Value

Type PreferExternalManifest, and then press ENTER.

Right-click PreferExternalManifest, and then click Modify.

Enter Value Data 1 and select Decimal.

Click OK. Exit Registry Editor.

The RDP app is %windir%\System32\mstsc.exe so the manifest file is mstsc.exe.manifest.

I can't attach the manifest file so here is the contents:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">

<dependency>
  <dependentAssembly>
    <assemblyIdentity
      type="win32"
      name="Microsoft.Windows.Common-Controls"
      version="6.0.0.0" processorArchitecture="*"
      publicKeyToken="6595b64144ccf1df"
      language="*">
    </assemblyIdentity>
  </dependentAssembly>
</dependency>

<dependency>
  <dependentAssembly>
    <assemblyIdentity
      type="win32"
      name="Microsoft.VC90.CRT"
      version="9.0.21022.8"
      processorArchitecture="amd64"
      publicKeyToken="1fc8b3b9a1e18e3b">
    </assemblyIdentity>
  </dependentAssembly>
</dependency>

<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
  <security>
    <requestedPrivileges>
      <requestedExecutionLevel
        level="asInvoker"
        uiAccess="false"/>
    </requestedPrivileges>
  </security>
</trustInfo>

<asmv3:application>
  <asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
    <ms_windowsSettings:dpiAware xmlns:ms_windowsSettings="http://schemas.microsoft.com/SMI/2005/WindowsSettings">false</ms_windowsSettings:dpiAware>
  </asmv3:windowsSettings>
</asmv3:application>

</assembly>

Copy the above into notepad and save the file with the appropriate name to the same folder as the executable.