I have an HP printer* with multiple paper trays. How do I enable automatic selection of the tray where I have a specific type of paper installed?
(I'll defer doing this from LibreOffice™ for now.)

I installed the printer using HPLIP and it works every way that I ask it to. I can use printer console controls to select the paper tray and get the output that I seek. I am hoping there is something that I can do to accomplish that without a trip to the physical printer.

OKAY, I can:

• Launch the HPLIP Device Manager, then select the printer. Choose Printer Settings and General...whew! At long last, I can then scroll to set the desired paper tray.
• The desktop++ Printer Status dialog does not offer any way to select a tray. It appears that I might be able to adjust the settings for an existing print job on the queue for my multi-tray printer.

I really hate to open another dialog, select the paper tray, print, then select the tray that I use most of the time.

Here is an example use case:

I'm in a browser and have a page-fragment that I want printed. Using my brower, I select PRINT.[/LIST]
Then, within the browser's printer page, I set portrait vs. landscape according to the shape of the page-fragment. I also set 1 vs 2 sided and 1 vs. 2 vs. 4 pages per sheet.

I do not find a way to select the paper tray within the broweer dialog.

I select the option to use the system printer page instead of the browser's page.
(In most cases I must re-configure the settings.)

Again, I do not find a way to select the paper tray.

I use one of the known-to-me dialogs to select the desired paper tray.

I select PRINT.

I use the known-to-me dialog to set the tray back to my prefered default.

Thank you in Advance,
~~~ 0;-/ Dan

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*printer == the printer is an HP 7740 Wide Format All-in-One.
++desktop == I'm running Cinnamon DE v6.0.4 on Linux Mint 21.3

When I select "Print using the system dialog" in Firefox it lets me select the paper tray.

What version of hplip do you have? This link says that you need at least 3.16.10 for your 7740.

Help About from HPLIP Device Manager reports that I'm running v3.21.12 of HPLIP and v15.0(Qt4) of Device Manager.

I do see tray selection in both LO and System printing dialogs. There is both a Paper Source and Output Tray selector presented. However, it seems that one must select the printer is LO before asking for the system printer dialog ... makes sense. The option to choose appears even if the printer has a single tray ... no harm, just sloppy IMHO.

In the very olde days, I'd request a print with a certain paper stock and the OS would find a printer that had that paper available. If there wasn't one, the OS would queue a request for a paper change. Sigh... Why can't I ask for letter, legal, tabloid, #6 or #10 envelope, and
the various apps, utilities and system services sort it out. It is the 21st Century isn't it?

Cheers,
~~~ 0;-} Dan