XnView Software

I have always used the "comment" field (inside the jpg); now that I also use the phone to take pictures, I have a gallery in the phone that uses XMP fields. In the top bar of Xnview MP with the "sort" button I can sort by "comment", but I can't find how to sort by "XMP:Title"; how can I do it?
Thank ...

Thank you

Too bad, I considered it a great feature.
(google translate)

I have this in Portable mode:



and this in installed mode:

When I use "filter by" on installed XnviewMP, I have the option to filter by stars; when I use a portable XnviewMP, there is no option to filter by stars.
How can I add this choice?