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bill@plunkettphoto.com

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Projector and Dual Monitor question
« on: July 02, 2023, 11:03:32 am »

I need a solution to a (probably) one-time situation. I need to demonstrate LRc and PS to a small photography club in my studio. I had originally thought to just have everyone watch over my shoulder but have decided this may not be the best solution.

I have a pretty new iMac with an Eizo 2nd monitor. Is there a way to make an attached digital projector display BOTH screens side-by-side so everyone can easily see both screens without being crowded and looking over my shoulder?

Any help would be greatly appreciated.

Thanks
Bill Plunkett
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Bill Plunkett

digitaldog

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Re: Projector and Dual Monitor question
« Reply #1 on: July 02, 2023, 01:18:27 pm »

Short answer: no. You can use something like an i1Pro to calibrate and profile the display or projector, BUT if you mirror (which is likely the case in a presentation), one or the other device has to go through the same profile. Result; one looks OK, and one looks awful.
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mcbroomf

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Re: Projector and Dual Monitor question
« Reply #2 on: July 02, 2023, 08:13:31 pm »

As I'm reading your question you want to be able to show the 2 monitors together (side by side) on the projector (so that say you can show Bridge on one and PS on the other).  If that's the case then I'm not sure but I think this suggests you can

https://support.apple.com/guide/mac-help/extend-mirror-mac-desktop-multiple-displays-mchlb5f905a1/mac#:~:text=When%20you%20connect%20one%20or,entire%20desktop%20on%20each%20display.

"Extend or mirror your Mac desktop across multiple displays
When you connect one or more external displays to your Mac, you can choose what appears on each display.

You can use video mirroring to show your entire desktop on each display.

You can extend your desktop across two or more displays, and choose which display shows the Finder and application menu.

If more than two displays are connected, you can specify that some use video mirroring and others use an extended desktop.
"

I was going to test it with my Macbook Pro which has one external monitor and add a 2nd monitor to it but I can't find a Thunderbolt to HDMI or DP cable for the extra monitor.  I think I have one, maybe the mornign will shed some light.
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mcbroomf

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Re: Projector and Dual Monitor question
« Reply #3 on: July 03, 2023, 04:21:03 am »

I found the missing cable and tested it.  You can mirror 2 and extend onto the 3rd but you can't extend 2 of them and mirror them onto the 3rd.
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bill@plunkettphoto.com

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Re: Projector and Dual Monitor question
« Reply #4 on: July 04, 2023, 09:23:22 am »

Thanks everyone for the help.  You pretty much confirmed what I thought to be the case but I just wanted to see if anyone had any "secrete sauce".

I'll just use LRc/PS in a one-monitor situation and mirror it to the projector.   I've just used 2 screens for so long that it is really awkward to just use 1.

thanks again,
bill
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Bill Plunkett

digitaldog

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Re: Projector and Dual Monitor question
« Reply #5 on: July 04, 2023, 10:51:36 am »

I'll just use LRc/PS in a one-monitor situation and mirror it to the projector.   I've just used 2 screens for so long that it is really awkward to just use 1.
Again, while that will work, the color appearance of one will be a mile off from the other. Pick which one is more important and use the ICC profile associated with that device for previewing.
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