Support for multiple displays on a single display in a flexible arrangement

[waydabber]

On a big TV or video wall it would be useful to arrange multiple independent logical display side-by-side in multiple rows or in any arrangement that fits the use-case. This could be useful for control centers, NASA and the film industry wanting to create impressive sets of huge displays with subdisplays. :)

[Laksmack]

This feature would be huge, and would really be useful for me +1 on the feature request :)

1/4, 1/2, and 1/4 split of my screen would allow for the main screen and 2 separate work areas.

if this became a separate tool, I would buy a license :)

[waydabber]

This is now basically possible with multiple PIP windows (set to high priority, shadowless, title-less) as PIP windows now remember their location and can be auto-started as well. Still, keeping as an open issue as a more dedicated solution would still be useful.

[scottperezfox]

Adding support for this feature. Here's an image of what I'm trying to achieve.

As we know, macOS has different functionality for separate displays than it would for simply a single monitor with the equivalent pixels. For me, I think we'd need to add an option to specify the split — not merely halves, quarters, etc. The ability to map the total pixels as "virtual displays" would be life-changing

[rainx0r]

This is now basically possible with multiple PIP windows (set to high priority, shadowless, title-less) as PIP windows now remember their location and can be auto-started as well. Still, keeping as an open issue as a more dedicated solution would still be useful.

I bought a license to try this out (and because I could use some other features in the near future) and while it's very close to being practical it does not feel quite there yet to me at least. Positioning the PIP windows correctly is a pain especially after turning off the title bar, removing the black border and shadow requires free aspect ratio which makes it even more inconvenient.

Then, setting one of the virtual displays as the primary display broke the entire system (the PIP windows just disappeared), and the solution is not quite that functional unless a virtual display is set as primary so software opens there automatically. After making my real display the primary one again, the PIP windows had moved around as well.

So I think a proper solution to "monitor splitting" (even using virtual displays + PIP, just positioning the windows automatically based on some layout and managing primary display properly) is still very much warranted. A feature like this would be extremely useful for 32:9 setups, so I'm really looking forward to when it eventually gets implemented.

[waydabber]

Right, I still plan to add this feature. Meanwhile the upcoming version will have full PIP CLI support so you should be easily arrange PIP windows precisely with a simple script in an easy-to-reproduce manner.

#2668

[waydabber]

(note: virtual screens are also fully scriptable now - so it is quite easy to create a script that turns on virtual screens, sets main screen in the preferred way, arranges PIP windows for them in any configuration on a preferred display etc. And then it is similarly simple to turn the entire thing off. A script then can be added to Shortcuts for easy run (or it can be written in Shortcuts to begin with).

[rainx0r]

(note: virtual screens are also fully scriptable now - so it is quite easy to create a script that turns on virtual screens, sets main screen in the preferred way, arranges PIP windows for them in any configuration on a preferred display etc. And then it is similarly simple to turn the entire thing off. A script then can be added to Shortcuts for easy run (or it can be written in Shortcuts to begin with).

Hm yeah if this all is possible then that would be enough for me to get exactly what I want, looking forward to the next release then!

[gabrielbacha]

Right, I still plan to add this feature. Meanwhile the upcoming version will have full PIP CLI support so you should be easily arrange PIP windows precisely with a simple script in an easy-to-reproduce manner.

#2668

Excellent timing, +1 for this feature!

[waydabber]

Note: CLI for PIP is available in the 2.2.4 release now. This should make connecting virtual screens, starting and arranging PIP windows to exact coordinates etc possible using scripting.

#2668 (comment)

Of course this does not mean that I am not planning to add the "multiple displays on a single display in a flexible arrangement" streaming feature as well in an upcoming version. :)

[rainx0r]

Got the chance to try it out. With two displays, Left and Right, 16:9, this script automatically positions them on my real display side by side.

#!/bin/sh
REAL_DISPLAY=LS49AG95
VIRTUAL_DISPLAY_1=Left
VIRTUAL_DISPLAY_2=Right
MAIN_DISPLAY=Right

# Connect the displays
betterdisplaycli set -namelike=$VIRTUAL_DISPLAY_1 -connected=on -pip=on
betterdisplaycli set -namelike=$VIRTUAL_DISPLAY_2 -connected=on -pip=on

# Set a virtual display as the main
betterdisplaycli set -namelike=$MAIN_DISPLAY -main=on
sleep 1.5

# Position the displays
betterdisplaycli set -namelike=Left -pip -targetnamelike=$REAL_DISPLAY -width=50% -height=100% -originx=0% -originy=0%
betterdisplaycli set -namelike=Right -pip -targetnamelike=$REAL_DISPLAY -width=50% -height=100% -originx=50% -originy=0%

Seems to work fine, the main caveats are:

• The real display still has to be somewhere, in this case I've got it arranged above the virtual displays. Therefore moving my cursor upwards puts it into the "real" display, which isn't a huge deal, but it'd be nice if it would be possible to somehow lock the cursor to the virtual screens.
• What does make it a bit annoying though is that the PIP windows are not "locked". They're still draggable so if I move my cursor up into the real display and then forget about it, when I try to click somewhere I can end up moving the PIP window and having to re-run my script. Looking through documentation, there doesn't seem a way to lock PIP windows?
• PIP windows are 60Hz and not 144Hz, but not a huge deal and not sure this is something that be fixed without a completely different approach.

[waydabber]

Nice work!

Hmm. I can add an additional option when the window level is set to absolute to make the PIP window click-thru (so the window itself does not register clicks) or an option to make it unmovable by dragging it. Would that be useful?

You can also move the real display in the layout using the moveTo or placement parameters (for example to one of the corners) so the mouse does not get through that easily

[waydabber]

#2717
#2718

[rainx0r]

Nice work!

Hmm. I can add an additional option when the window level is set to absolute to make the PIP window click-thru (so the window itself does not register clicks) or an option to make it unmovable by dragging it. Would that be useful?

An option to make it unmovable by dragging it would be really appreciated, and I reckon it'd probably also be useful for other use cases too.

I don't think making it click-through would help as it would then make clicks go onto the "real" (empty) monitor underlying the two PIP windows.

You can also move the real display in the layout using the moveTo or placement parameters (for example to one of the corners) so the mouse does not get through that easily

In the end that's more or less what I did by positioning the real monitor above both virtual ones in the arrangement, though I did it manually through macOS System Settings. I find I almost never get the cursor that way. And even if I did, if I could have the PIP windows locked then there wouldn't be much of a problem.

[waydabber]

I plan to add click-thru option for hovering PIP windows that are set-to semi-transparent.

[waydabber]

Here is an interim build with these changes. The features are accessible via CLI as well.

https://github.com/waydabber/BetterDisplay/releases/download/v2.0.0-pre-release/BetterDisplay-v2.2.5-b27284-pre.zip

[jackbobevolved]

Does this support HDR or refresh rates above 60hz? I'm looking to use this on a 5120x1440@240hz monitor to create side by side 1440p240 virtual displays for DaVinci Resolve. Attempting to use the monitor's built in PBP mode reduced it to 60hz, but the monitor works great via HDMI 2.1 as a single monitor, but that doesn't play well with DaVinci Resolve.

[szymczag]

Hi @waydabber, any updates on that? I'm thinking about buying some UltraWide screen, but without separate screen support (PIP?) it would be useless.

[waydabber]

I still plan to implement this of course, but no updates right now regarding this. PiP works just fine + PiP was improved in many ways during the v2.x updates so it's much easier now to construct a video-wall like setup with exact positioning. Also, the whole thing is now perfectly scriptable thanks to betterdisplaycli.

[cross]

Hello! I've come here looking for the same as others, the ability to treat a single display (in my case, a dual-display that presents as one because the Mac can't address it as two) as two displays.
From above it sounds like this can be done with virtual displays and PiP, but I'm having trouble figuring it out. And, I am not able to find the cli to see what the scripting options are. I see your repo, source, is that the only option for that client? If so that's fine, just wanted to make sure I'm not missing something.
Anyway. I guess I'm looking for docs. :-). And, +1 to a "split this display you see here into two (or N) displays evenly" type of option. Which it sounds like is intended, just not there yet.

[waydabber]

Here are the docs:

https://github.com/waydabber/BetterDisplay/wiki/Integration-features,-CLI

You don't need to install betterdisplaycli, you can use the already installed app binary as well (see the documentation about that), but the command will be a bit more awkward due to the long path.