Focus allows the user to isolate a specific node and the children pertaining to that node. For example, it allows for the isolation of a branch and any of the levels and generators relating to that branch.
Focus is useful for making quick edits and for editing the generators to achieve the users desired effect. Not only does this tool allow for focused editing of a specific area, but it also decreases the compute time because only the visible nodes are computed until focus is disabled.
'Clear' - Disables the focus tool and displays all the nodes that were previously hidden.