How to increase the size of virtual desktop?

[pilotoring]

I don't like to import windows into cockpit nor take off HMD and put on glasses to read charts. So my best method is going to the virtual desktop to read charts or type messages in vpilot. But unlike FI fsx or FI xp, the virtual desktop in Flyinside p3dv4 is too small. Is there a way to change the size?