How to select multiple tags/data element to save in particular library and build

[#1]

I have to individually open the data element and save and build the library.

any option for multiple selections?

[#2 · Accepted solution]

If you go to the "Publishing" section, you can click on a library - and then select "Add a Resource".  It's not as fast as the method you described (which is a good idea to implement!), but it is an organized one-stop shop for library management.