# system.nav.openWindowInstance

**URL:** <https://forum.inductiveautomation.com/t/system-nav-openwindowinstance/3615>\
**Category:** Ignition\
**Created:** [November 17, 2011, 2:28am UTC](https://forum.inductiveautomation.com/t/system-nav-openwindowinstance/3615 "2011-11-17T02:28:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![scott\_rister](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@scott\_rister](https://forum.inductiveautomation.com/u/scott_rister)\
**Post date:** [November 17, 2011, 2:28am UTC](https://forum.inductiveautomation.com/t/system-nav-openwindowinstance/3615/1 "2011-11-17T02:28:52Z")

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I am trying to set up my app so multiple instances of the same display can be opened at one time.  
I recall from one of the training videos that this can be done using: system.nav.openWindowInstance as opposed to system.nav.openWindow. I have set up my scripts accordingly but still only get one instace at a time. in addition the system.nav.centerWindow command that follows the openwindow command appears to be ignored as when the window opens it is not centered.  
is there something else i am supposed to be doing?  
i am running ver. 7.3.0  
here is the actual code:  
system.nav.openWindowInstance(‘Detail\_PS\_DC’, {‘Name’ : ‘DC-1 Power Supply Detail’, ‘Pulse’ : 0})  
system.nav.centerWindow(‘Detail\_PS\_DC’)

Thanks,

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<div class="post-metadata">

**Author:** ![scott\_rister](https://avatars.discourse-cdn.com/v4/letter/s/5daacb/32.png) [@scott\_rister](https://forum.inductiveautomation.com/u/scott_rister)\
**Post date:** [November 17, 2011, 2:48am UTC](https://forum.inductiveautomation.com/t/system-nav-openwindowinstance/3615/2 "2011-11-17T02:48:48Z")

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Sorry, just got it.  
Apparently the instances of the display were being opened behind my main window.  
I changed the layer and dock index of the window i was trying to open multiple instances of to a number greater than that of the main window and now works.