XnView Software

In XnView MP Tools > Settings... > View > Filter -- Custom do you have AI/PDF/AI selected?

That would seem to be a prerequisite for viewing those formats, but possibly not sufficient... :wink:

See also Tools > Settings... >File list > Custom filter , to complicate matters, not sure how those two ...

... you browse to a folder in XnViewMP, it stores information about those files in the catalog (assuming you have the Catalog enabled; check your settings). In essence, browsing to a folder "auto-adds" it to the catalog, without a separate import step. Once the information is stored, it is available ...

jotess wrote: Thu Nov 13, 2025 3:47 pm checkbox "add this template to the list" that can be selected every time I use the dialogue

this is weird approach
better to add Presets functionality that will save all tool's settings, eg like in Batch convert

... size" or "modifiedts-size" or "driveid-uniquefilenumber", as well as the existing "fullpath" method, one of which the user could choose in settings, as these would make thumbnails once generated immune to moves, and use of a drive ID would tackle drive letter changes. In this regards I would ...

... the thumbnail key so that the thumbnails are immune to moves. Obviously to use modified-size it would be up to the user to avoid a combination of settings whereby saves were performed without updating the timestamp that also didn't alter the size (such as changing a PNG from entirely red to entirely ...

The startup of XnView has generally been very slow for me when launched from my exFAT R: drive. I tried the different startup settings with no luck.
What I have found is that making a subfolder hidden that is full of files unrelated to xnview usage, dramatically changed the startup speed from very ...

You're talking about browsing in XnViewMP, right?

I did some tests at one point, when I was configuring the app, and I seem to recall that using webp for thumbnails was a little bit faster than using jpeg.

Have you actually timed both settings on the same folder?

EDIT: Replicated with a blank Portable version, only modified settings a bit to make sure sidecar files are being generated. HOWEVER was able to replicate with DEFAULT settings after this as well!
Video and XNView.ini i used for this test:
https://www.dropbox.com/scl/fo/zdf1o23u2l093ezyc6wff ...

... file, having joined the two files you could then try saving the combined file to a PDF, or alternatively you could try loading the files into Batch convert or XnConvert and then output to a PDF file, you might possibly need to experiment with the Output tab settings.

Single or multi-page JP2 files?

change View from 'Embedded preview' to 'Full size'
in Settings > Read > Camera RAW

... that way.
However they certainly need to be cleaned up afterward.
In addition, I think there should be a custom temp path people can enter under Settings - Paths
For myself I generally redirect temp files of programs I use to ramdisk.

The whole temp files in windows generally is very badly designed ...

Go to Settings > File list

Configure these two settings to your liking:
- New files are added at the end of the list
- Auto-select new files

... in XNview with a category
Close XNView and delete that file in windows explorer (Also delete any relevant sidecar files)
Re-open XNView
Go to settings > Catalog
Run all "Maintenance", "Synchronize" and "Update metadata" features on relevant folder
Go to Catalog Filter Pane, and click the filter ...

FYI For another application named MuseScore I noticed they changed recently from Qt 6.2 to Qt 6.9 and this changed the workflow for printing.
Previously, a Ctrl-P triggered a large window named "Impression à partir de l'application Win32" and there was a statement that the application do not support ...

so, you are able to make a script but can't check app settings?