Belkasoft X Help Contents
Artifacts
Under Artifacts title, there is another chart showing you breakdown by type of artifact, such as mails, chats or browsers. Note the difference with the first chart by Application types, which shows breakdown by application (e.g. Chrome or Safari) vs. breakdown by all browsers, all chats, all mail types shown here:
If you switch to the chart view, you will see a pie chart:
You could collapse one or both graphs using the arrows 
and 
.