Use this window see all topics in one list, see what features are in use (hyperlinks, documents, etc.), to edit topic names, hyperlinks1) or hints2).
Columns
The first two columns are to identify the topic:
- Topic type -
dependency network group, 
dependency network, 
calculated data link, 
simple data link - Topic name
The next set of columns are buttons to perform actions on the topic:
- Delete the topic - enabled only if it is has no dependents (there are no topics that connect to it from above)
Open the topic's properties editor
Jump to the topic's hyperlink - enabled only if a hyperlink has been specified
Open the document list for the topic - icon is blank if there are no documents associated with the topic
Accept changes - icon is visible if edits have been made. If the topic's name is changed it will be verified that the new name does not exist before the change is made. 
Cancel current edits and restore to the originals.
The last three columns are in-place editors for:
- Topic name
- Topic hyperlink - A hyperlink can be tested by double clicking the hyperlink's text.
- Topic hint
Spell Checking
The topic name and hint in-place editors both incorporate automatic spell checking if ISpell is installed.
1)
A hyperlink is a connection to external information. It is represented as a typical URL and can refer to a web-based or file-based document. When a hyperlink button is pressed or an internal jump to hyperlink command is run, NetWeaver attempts to launch your default browser to the hyperlink.
2)
The hint is a brief description of the topic. In the case of data links it should be the question to be asked to elicit the data.