Change number of monitors at Remote Desktop session

The connection settings are saved to a hidden RDP file in the Documents folder by default. So, you can also open this file with a text editor and directly edit the values there to set up the multi monitor remote connection. Here are the steps to do so:

1. Navigate to the Documents folder and make sure Show hidden items is enabled.
   
2. Open the RDP file with a text editor, add the following line, and then save the file:
   use multimon:i:1
   
3. If the display order is incorrect, execute the mstsc /l command in CMD to view all the monitors on your system. They’ll be listed as 0, 1, 2, and so on.
   
4. Next, you can adjust the values for the selectedmonitors line to rearrange the monitors in the correct order.
5. For instance, if you have 3 monitors listed as selectedmonitors:s:0,1,2, you could edit it to selectedmonitors:s:1,2,0 to change the display order, or selectedmonitors:s:0,2 to use 2 of 3 monitors.
6. Remember to save the settings once you figure out the correct order.