Is it possible with DisplayFusion to control the second monitor with a window on the first one? In my case, I can't see the second monitor directly, and I need to monitor what I'm displaying and the windows on the second monitor with a window on the first monitor that allows me to interact with the elements on the second one. Is it possible?

TNX

Sort of, but not in the way you're describing. You may create a mirror of the window/screen, but you may not interact with that mirror. Think of it as a real mirror IRL. You don't interact with your face through the mirror, you interact with your real face and you see what you're doing from the reflection.

You make a mirror(probably a hotkey?), drag that to your primary monitor then move the mouse cursor back to the second screen. (The entire window mirror is a drag handle, so it shouldn't be too hard?) You can then see the mirrored mouse cursor that is on the second screen. If you mirror the screen, the framerate will be pretty low and it might be more challenging than if you were mirroring a single window at a time.

In a hackish way, you can also do this with the Windows Magnifier app. (Win & +) (Ctrl-Alt & D) for docked mode. Then drag the docked window away from the screen edge. You'll have a 1:1 pixel representation of what's near the mouse in a window that stays put. But if your second screen is too big, you'll find navigating it via a smaller window to be a challenge. DisplayFusion's mirror can be scaled to lower than 100%.

I have a trial version of DisplayFusion but on this one I can't activate the Mirror mode to see if it suits me.