After you created your first taxonomies and terms, you can now assign taxonomies to files. Let's begin!
At the bottom of the "Meta-Data" section in "File -> Edit" you can select from existing taxonomies and terms. Once you select a combination you can click "Add Taxonomy". Once added, you can see all your taxonomies above the input mask and also delete them if neccessary.
Attention
Please note that taxonomies are only persistant after you press "Save".
Once assigned, you can see the taxonomies in the file preview. You can also search for your taxonomy in the advanced search.