Finally I figured out, that it is already possible to transfer locations between entities. First the entity has to be select, than "transfer and merge" move the location to the specific entity. 

It is ;)

First select the entity and than choose "transfer and merge" ... it will be moved to the current choosen entity.

Also there is a plugin for telegram.

Tried to do it with GenericObjects... But also Positions plugin didn't support it. So maybe devices/networkdevices should be still the best :(

@_{Óscar A network device in my definition is some device, which connects multiple devices or "translate" between different networks (Switch, AccessPoints, Hubs, Router, Gateways etc)}

_{BTW, devices also have network ports.} 

Found the answer:

https://plugins.glpi-project.org/#/plugin/fpconsumables

something like:

##lang.consumable.location## : ##consumable.location##

You can assign one picture in the cartography plugin. But wouldn't be displayed on the asset list, just in the map.

Also afaik V 9.3 support front and back pictures for Rack Mounted devices (not sure about this).

Same one Devices

that would be really useful. Not just for finding duplicates but just for comparison. Possible compare two or more.

Or just open the software, and you will see on which computers it is installed.