Hi Leonid, 

thank you for the help, but I have already solved it somehow, 

there are possibilities for it in UNA, but I do not consider such a solution to be systemic ... 

In addition, the ability to create album searches by category doesn't work ... with the solution which I helped me...... 

It is necessary to see, that not everyone can do this according to the procedure in the instructions you sent ... they are not all programmers like me or maybe you ... 

When all other entities like Event, photos, videos, ... etc, they have the option to add or insert a category, 

so albums and all other new entities that will be created in the future should have the opportunity to add category. 

For this reason, I wrote this request in the forum ... 

Greetings and best wishes ... 

JURAJ

PS: I hope this will read somebody from Boons group :-)