Apps :: Finding Utilities For Multiple Monitors?

In my home theatre I have a Win 10 Pro PC , set up for Extended Display set up for:

- a large 4k TV (the default), with high res settings (Monitor 2)

- a small legacy 17" display, low-res settings (Monitor 1)

The large screen is the default screen, as that's what I need to be displayed when watching media, and controlling things via a wireless keyboard on the couch.

The purpose of the small display is simply so that I don't have to have to keep the large display on when:

-doing minor config/setup work

-listening to music via iTunes

-viewing the 'current' song being played on my digital cable box

-etc

It's more or less working well, but THE ISSUE IS THIS:

When working when both displays are on, and the active window in on the large display, I can select it and drag it over to the small display to work with. But when the large display is powered off, I am blind ; all I see is the task bar and whatever I launch goes , of course, goes to the default display.

-Is there any tool or utility I can use to virtually see the open window on the active monitor and so I can drag it over?

-Is there any tool or utility , like TeamViewer has, where there is a top level menu "Next Monitor" to manage the screens.

Ironically, when I do use Team Viewer from another room, its perfect as I can flip between monitors at will (as I am starting on the 'default' screen). But when I am in front the physical machine, in front of the small monitor, I dont have that option.

What I kinda need is the multiple monitor option of Duplicated displays, but that does not work because of the different resolutions.

I can use Show Desktop Only on 1, as I cant get there ( ie a right click will always show up on the large screen only as is the default.

I need to power up the large display, drag the window (eg iTunes) to the smaller display, and then turn off the large TV.