there is/was a way to emulate large prints by printing slices of the image, anybody remember how or where i can look thx

Thank you for this tip! But I am not sure if it works, because I have deleted all but the jobs. The name of the printer maybe still the same but some of the media type names changed.
I will see - thanks!

I usually try to do the same: use exactly the same settings as when the profile was created.  But I've found over the years that the quality selection usually has little influence for the printers I've tested.  One profile should be good for most quality settings but there is a small difference.

Did you print the original targets from Qimage?  You could always open the job log and recall the job where you printed the profiling target (if you did that).  Or just pick an old job that you know had the correct settings.  Then after opening the job, just open properties and look at what the driver settings were for that job.

Mike

Yes, this seems to be the best.
Now it behaves, as expected. At least I do not need to check everything like the right profile and can use the excellent sharpening of QImage.
Meanwhile I have configured again all my media types again.
My only concern is that I'm not entirely sure if I'm using the same driver settings now as I was when I created the profile. Do you have any experience of how much influence the choice of quality has in this respect?
Many, many thanks for your support!
Ernst

Since the P900 driver isn't responding like any other Epson driver, I would recommend turning off all AI options and then repeating the Shift-properties again.  That is, click on the AI Copilot button at the top of the main window and then uncheck all 5 boxes under Driver AI at the bottom.  That will make Qimage behave like a typical "dumb" program like Lightroom, Photoshop, etc. where it doesn't try to do anything "fancy" with the driver and just assumed you know how to operate the driver.  Then you are responsible for all the driver settings and you'd have to set them manually like other programs.

Mike

I checked now how the driver setting is (view from windows) - Finest Details was set.
Next I started QImage. Media Type was still the same as shown in the driver setting a few moments ago. I opened Properties with Shift and it shows Finest Details enabled. I closed the Properties with OK. Print Resolution has shown for a very short moment Max-720 PPI but changed immedeately back to 360. Now I opened Properties again without holding Shift and "Finest Details" is NOT set.

I will try the following:
Delete the Printer Setup of QImage for this paper. Do all necessary settings in the driver starting from Windows. Then I start QImage and do the settings there. Properties I will oben with holded Shift, check and save.
Maybe that I already have done this without knowing, but I think, it is worth to try.
I'll tell you ...

I tried it two times now - as normal user and as administrator. But always the same. "Finest Details" setting will be lost from the view of QImage whereas it is set from the view of Windows. :-(

Another idea: First I will delete all references to this printer in QImage that I can find. Next I will delete the printer driver and reinstall it. Then I'll try to configure the Printer Setups for all papers that I need. Or do you have a better idea?
...
A few hours later - I've done the following without success:
1) I deleted all *.prt and *.pr1 files in the directory (and sub directories) C:\Users\ernst\AppData\Roaming\ddisoftware\Qimage
2) Closed QImage
3) Deleted the printer in Windows
4) Installed the most recent driver (V6.82.0.0) from Epson homepage
5) Checked in Device Manager and EPSON Print Layout, if the printer will be listed - OK; closed Print Layout
6) Started EPSON Media Installer to check, if all Media Types still are listed - OK; To be sure, I pressed again the "actualize" button; closed Media Installer
7) Opened Printer Properties, chose a media type of my matte paper, configured all quality settings, set "no color correction" and saved this setting - so I can recall these settings, if necessary
8 ) Started QImage - The Media Type is already shown, Max-Resolution is 360ppi
9) Holding Shift I started Properties and checked the settings - they were exactly as I configured before
10) Closed all with OK ... still Max-Resolution is shown as 360ppi
11) Now I opened Properties WITHOUT holding Shift -> Finest Details is NOT set

I am at the end of my wisdom

I've found a number of issues with the P900 driver that suggest Epson just didn't "hook up" everything to Windows.  There are two printers that are a nightmare to deal with when it comes to bugs and incomplete drivers: the HP Z3200 (all Z series really) and the Epson P900.  The P900 is a bespoke driver that doesn't really follow the same internal coding as all their other drivers so I'm not sure they thoroughly tested all the Windows API functions that are required with every printer.  I can't prove it like I can (and have here) with the Z3200 but I've just noticed that the P900 has issues that no other Epson driver has.  They may not focus on all the required Windows connections because nothing but Qimage really uses those functions of the driver: the ability to select media type, media size, output bin, color management, etc. outside of the driver.  It's also possible that the combination of the Epson Media Installer and you installing your own custom media types has made some things "out of sync" with the driver.

Now, if you can check Finest Detail in Windows (printer preferences), just do that.  Set it in Windows and then in Qimage when you open the driver, click the Properties button with the Shift key held: it'll load the Windows defaults so it'll have no choice but to have Finest Detail checked.  With all the adding (and deleting) custom media types, it's possible something in the Qimage sticky driver settings got out of sync too so setting Finest Details in Windows and then using Shift-Properties to open the driver in Qimage should clear that.  There's no way that box will be unchecked at that point (using Shift-Properties) after setting it in Windows.  If it does, the Epson driver is REALLY messed up!

Mike

I can set it and it still is set next time when I do it by opening the driver settings from Windows. But if I open the settings from QImage kicking on Properties, it does not.
That's what I tried to explain you: I opened the driver settings side by side (same time, same view, same media type) - in the window opened with QImage Finest Details is NOT set, in the other window (opened by Window) it is set.
I could make a video from my desktop so you can see, what I mean.
And I have another strange behaviour that seems to me hat is not correct: I have chosen a Media Type, then I wanted to check Orientation or Profile (I don't remember exactly and that's why I didn't tell you before). In the moment when I pressed this other button, Media Type changed to a completely different paper. I think, Media Type never should change by itself.
I saw this behaviour two times but I never knew exactly which other button I have pressed (I am IT engineer and know how hard it is to find errors if you get wrong informations).
I printed flawless with QImage more than a year. All this began, when I tried to check the Finest Details feature.
I can reinstall QImage  - no problem, but I think it only makes sense if I can clean absolutely everything of the existing installation of QImage. What do you think?
Thanks!

Then either the driver is broken or something fouled up with you trying to install your custom media types and there is something wrong with that custom media type that makes it incompatible with the Finest Detail option.  I've never seen that option not stick in 26 years of doing this, on ANY printer.  If I go into the P900 driver, I can get Finest Detail on every media type, even plain paper.  So I would have to presume the media type you added is somehow broken with respect to the quality options available.  Qimage can remember every setting you make in that driver so if the driver is forcing Finest Detail back to UNchecked, that's a problem with the driver or your installed custom media type.

Again... nothing to do with Qimage.  This is a driver problem.  But I'm just trying to help you with the driver.

Mike

"choose the profile you want, go into the driver, check the Finest Details setting, and when you are done, go back into the driver and confirm Finest Detail is still checked (it will be)."

That's the problem - it is not! I checked Finest Details, confirmed with OK, went back again into the driver and Finest Detail is not set anymore :-(