XnView Software

I prefer minimalist design and maximise the viewing area when i use Xnview.
But if I disable title bar, there remains no close and resize buttons.
Close and resize buttons could still be shown when title bar is disabled.

Could there be an option to arrange thumbnails with different aspect ratio more efficiently?

Before after pictures:

before https://drive.google.com/file/d/19wEYvhPA7vUTEOkqAjgzRklcldIZaPug/view?usp=sharing

after https://drive.google.com/file/d/1ikK-f5vrwaKTI6WDPBV5_XnyqgUOaiiQ/view?usp=sharing

A thumbnail which is extracted from a movie frame usually doesn't really give an idea about which film it is.
It would be great if Xnview shows embedded thumbnails at least for mkv files since it is used
most commonly for archiving movies. Here is before and after pics how it willl look like:
https ...

In slide show settings, selecting stretch small images option doesn't stretch image to full screen. At the top and bottom a few pixel gap remains, which is visible when background colour is not selected as black, this is annoying.

In Xnview double clicking on an image file was opening the image and background color at the same time. (full screen mode)
Now in Xnview Mp double clicking an image shows first the selected background color (very short) and then shows the image.
Much better to show the image and background color at ...

It is only possible to terminate a slideshow with the escape key.
Much better to terminate the slideshow with a double click.

In Xnview there was a quick slideshow option in full screen right click menu which was very handy.
Now in xnview mp there is no option to switch to quick slideshow in full screen mode.

It would be very nice to have that option back again.