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I use my external display in tower mode. I've been using third party software ( like Moom ) to split my screen horizontally when needed. Now that El Capitan supports split screen in full screen mode, is there a way to split screen natively with two apps in horizontal split, in full screen mode.

I searched everywhere and I am able to place two apps side by side but not top and bottom. I have also tried reducing window sizes of apps so that they fit well when in horizontal split mode. But still I never get the option of putting one on top of another.

Is there any other settings I need to enable? I have enabled Displays have separate Spaces

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    Apple hasn't made this possible (yet). You can send feedback to Apple here. Could you please add the apps that helped you split your screen horizontally, so other users can see what helped you? – At0mic Oct 31 '15 at 13:24
  • oh, I'll send the feedback then. Added the software that I use presently for putting 1st app on top half and 2nd app on bottom half. – sdayal Oct 31 '15 at 13:34
  • I initially would have picked horizontal over vertical if I had the design choice here. One command line prompt and whatever else I'm doing works better for much of the work I do, but I have learned how to maximize my work and there are lots of places where I'm glad for/prefer the vertical choice so far. – bmike Oct 31 '15 at 15:08
  • This is an excellent question. I am looking for the same feature and unfortunately it seems as we are out of luck. There are several other tools that allow an individual configuration of the grid. – merlin Aug 12 '16 at 7:37
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As implemented on iOS 9 and later, OS X 10.11 lets you split the unified full-screen view into two portrait sections with one application on the left side of the partition and a different one on the right.

enter image description here

It's pretty basic, but it also is elegantly minimal with a clear geometry with only one degree of freedom.

My hope is that as more people get used to the mechanics of this, The software can be complicated to allow us to choose a horizontal petition if we desire to work that way instead of only splitting things vertically. Especially if there are compelling apps that work together in a wide but vertically narrow window.

If you have an excellent use case where you could be more productive at your work, please consider polite activism at http://apple.com/feedback

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    My excellent use case is a monitor rotated 90 or 270 degrees into portrait mode. – Stephen Kiningham Sep 3 '17 at 21:43
  • My excellent use case is watching training videos while taking notes. Videos are landscape and half of my screen is basically 70% wasted space, while also squashing the video. I like the vertical split fine for some things, but this is the thing that always irks me about Apple: just provide the option for the user. – seeafish Aug 7 at 13:25
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I use Spectacle with the following key combinations:

alt + cmd + left key
alt + cmd + right key
alt + cmd + up
alt + cmd + down

Spectacle is an open source application that lets you, as the official home page puts it, "move and resize windows with ease" with simple and customizable keyboard shortcuts.

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    It's best to add some supporting detail to this answer. – Allan Jun 29 '17 at 14:02
  • Please remove the link to macappstore.org which is no longer being maintained. Official homepage for the application is more than enough. – Franklin Yu Aug 4 at 19:45
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While you can't use any command to do a horizontal split you could add a new desktop to said tower screen and just portion things once while using the other desktops for the screen for w/e else you're using.

My scenario was needing to see outlook calendar and mailbox on one desktop while still having a desktop with the various chat programs I use + any full screen browsers. Thee desktops later, it's all sorted - one for chats, second for outlook and third chrome in full screen.

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Besides Spectacle mentioned by Nick, you can also split your screen with Magnet. It costs $2, but it’s available on Mac App Store.

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