When you upload an asset and want to classify it better, you can add extra metaproperty options to the existing list and link them to the asset. This feature works for the metaproperty options of the select type.
Drag and drop your assets onto your browser window or click Upload image.
Expand the metaproperty of the select type and click Add option.
Enter the name, and, optionally, a description and a thumbnail for this metaproperty option.
The metaproperty option will be automatically selected and the asset will be tagged with this new option after upload.