Question Faces Module - Cannot get started.

I must be missing something quite basic. Applying plus (+) sign to an image does not do anything for me. I gone thro' the forum, especially, this post , but can not find a solution.
Module:

In Preferences, there are no images

The Database has created table,
How do I select an image for Image-Map?
Thank you for your help


 

Usage
To mark people on an image, click the plus (+) button, select area around their face, then enter either their ID for those on the tree, or their name if they are not on the tree.

wrote:

Usage
To mark people on an image, click the plus (+) button, select area around their face, then enter either their ID for those on the tree, or their name if they are not on the tree.
 

Thanks @Franz Frese. Yes, that's what I see in the instructions, as well. I must be having a VERY senior moment because I do not see / do not get the Plus (+) button. Instructions for a Dummy please.

Ves a la " pestaña " -> " Álbum ", selecciona la foto que necessites (primero té que haver-la subido aquí) i seguidament, a la dreta del marc, trobaràs la " cruz " (entre altres botones. Mira la captura)
 

y luego sigue las instrucciones de Franz!
 
 

Thank you, @Bernat. Simple when one knows, how.