# Windows, Multiple Monitors, and finding the Main Screen turn on

**URL:** <https://forum.inductiveautomation.com/t/windows-multiple-monitors-and-finding-the-main-screen-turn-on/24571>\
**Category:** Ignition\
**Tags:** ignition79\
**Created:** [May 1, 2019, 9:55pm UTC](https://forum.inductiveautomation.com/t/windows-multiple-monitors-and-finding-the-main-screen-turn-on/24571 "2019-05-01T21:55:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SeraSera](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@SeraSera](https://forum.inductiveautomation.com/u/SeraSera)\
**Post date:** [May 1, 2019, 9:55pm UTC](https://forum.inductiveautomation.com/t/windows-multiple-monitors-and-finding-the-main-screen-turn-on/24571/1 "2019-05-01T21:55:21Z")

</div>

Hi All,

So the 7.9.9 release has some very useful functions for getting information about multiple screens.  
While it works great for creating popup/windows to show up on a separate screens, I’ve been having some difficulty determining which of the window’s screen’s is the main screen.

The following script:

```auto
list_o_screens = system.gui.getScreens()

for screen in list_o_screens :
	print screen

system.gui,setScreenIndex( min(list_o_screens ) ) 
#Main Screen Turn On

```

Works on the assumption that the screen on index 0 is the main screen. As those of us that work with Windows knows… Monitor ID does not always coincide with Main Screen.

Anyone have any tips? Maybe I am missing something from Windows or startup angle.

The end goal is to have a window/app always show up on a secondary monitor.