A keyword in a photo : what is it?

A keyword is an object model identified by an image corresponding to keywords.

When you drag an object onto this model, it identifies itself in the same way as the model. So, you store your photo in a cabinet in which you have folders labeled in such a way that you will find your photo easily.

1) Select a photo:

When you select a photo that has not keywords, you will only see the TIME tag that correspond to the date. 

2) Using drag & drop, you will assign a keyword (or maybe more than one) in a single move.

3) Now the photo has keywords and can be filtered using different filters