I have a dual 3840x1600 USB-C setup and it is a lot of pixels to traverse with alt space M and arrow left/right/up/down...Display 1 is the laptop monitor with 1920x1080 and the best resolution for VL in my opinion. It also turned out that monitor 3 was the main display, thus VL always opens its tiny popups in my upper corner. I changed display 3 to 1 as main and hopefully it's not going to jump back and forth for each dock/undock from now on.
This post from 2013 is still valid way to reproduce the scenario, and the alt+space+M will move your pop-up, but only if you don't swap between different programs - and this you can test with only 1 monitor:
Dobule click a MB to Open the "Select operand And Adress" dialog,
Hit alt+tab to hit your favorite web browser to search for a solution to the invisible window
Use alt+ tab to go back to the VL instance
Now the dialog/pop up is grey/passive: Try to open the move commando from the keyboard, and there is no response nor to the shortcut keys, escape or alt-F4. You have to activate the window before the keyboard Move commando, and it seems to behave different with or without the imaginary monitor
On a single active display you need to click on the dialog box, with the ghost display clicking anywhere on VL seems to activate the hidden b