# How to keep the display window in the main screen?

**URL:** https://discourse.processing.org/t/how-to-keep-the-display-window-in-the-main-screen/37302
**Category:** Processing
**Created:** [June 3, 2022, 2:00pm UTC](https://discourse.processing.org/t/how-to-keep-the-display-window-in-the-main-screen/37302 "2022-06-03T14:00:50Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![all](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@all](https://discourse.processing.org/u/all)
#### Post date: [June 3, 2022, 2:00pm UTC](https://discourse.processing.org/t/how-to-keep-the-display-window-in-the-main-screen/37302/1 "2022-06-03T14:00:50Z")

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Hello,  
I use my laptop (macbook pro) with up to 4 video projectors.  
When I launch the display window of Processing, I need to open it only in the screen of my laptop (and not in the screen of another screen or video projectors). Please, how to do it ?  
Best regards !

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<div class="post-metadata">

### Author: ![Pr0tonX](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/pr0tonx/32/2590_2.png) [@Pr0tonX](https://discourse.processing.org/u/Pr0tonX)
#### Post date: [June 4, 2022, 8:23am UTC](https://discourse.processing.org/t/how-to-keep-the-display-window-in-the-main-screen/37302/2 "2022-06-04T08:23:58Z")

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Hi,  
I guess that’s just a setting you have to fix on your mac :  
` Sytem preferences > Monitors > Display > Mirror displays to check/uncheck` if I remember well

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/d/5db62dfec3f908805b97650a850d5d65d5ac1033.png)

I think you can also move displays to reorder as you want, to put your desired processing window on your laptop

You might also try this :  
 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/6/56dc1bb7847df2d85f9587c8aa5d3fbb85b3caf4.png)

Just guess though, I don’t a mac to test it right now