Usability best practice

Hi forum,   I could need some advice on the following usability topic.   My app includes projects and documentations. A project can have several associated documentations and one documentation can belong to different projects. What is a good way /widged to do a multi select from all existing documentations while being in the project? Preferrably a easy solution I can implement quickly during a short live demo.   Kind regards   Jakob 
1 answers

Solved it with the Bootstrap Multi Select Widget: