It is possible to fill in or modify fields which contain attributes by right clicking on a selected node and choosing View Selected. Once the node has been displayed, the attributes fields are ready to be edited. There is also the possibility of working on them through the Long Field Editor. In case of long descriptions, one or more attribute fields can be edited here.
Note that whether attributes are present or not depends on the profile that has been selected.
In the tooltip which appears hovering on a field, you can also see information about the attributes of that particular field. The number of potential attributes, as well as the value for the attributes that have one specified are displayed too. For an overview of all the possible attributes, open the field in The Long Field Editor (Section 5.3).