XnView Software

full screen still doesn't enlarge image to fit. (linux at least)

For me it works ok on both ubuntu 32 and 64 bit, try to check your View/Auto Image Size settings in Viewer Mode.

This issue will only apply to images that are smaller than your screens resolution.
I hadn't noticed that that menu ...

just the xnviewmp directory as other things as well as jpg and png now. It gives an ivalid file type error (i didn't see before) and hangs.
no problem opening the images there with right click and open with xnviewmp.
and no problem from the start menu running empty xnviewmp.
Probably not worth ...

joined forum for this. Acouple of other people have already suggested.
Love the old xnview easily the best image viewer out there great work.
The old feature fullscreen zoom to fit is necessary.
I go through a gallery, some images are the size of thumbnails on my high res screen. until I zoom ...

I'd like to confirm I also had massive lag in a directory with 2 images and a couple of other files.
(I was running in wine on ubuntu - i know..) But here is the thing it only does it when starting the exe. Not when opening from an image.
But I had to force close the app was stuck in fullscreen ...