XnView Software

I need to filter on file extension, eg .png
The only way I can see to do this is to use the custom filter, and in the filter options turn on "exclude" (all three checkbox) and add all the other file extensions to the exclude list.
That works. But when I go into the filter dropdown and set to "all ...

Thanks. I see in the file list there are 2 options for "custom" file types, set by extension. I will experiment with this setting and the view -- filter by and get an understanding of how these work together.

scott s.
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I think I've tried to look everywhere, but in the view menu is a sub-menu "filter by" which provides various option radio buttons, including "custom". But I can't find any way to create a custom filter. Can this be done? I'm interested in filtering using a filename mask.

scott s.
.