Figure 5

Three types of labels used in LucidDraw. LucidDraw uses three kinds of labels to display node names. A) Labels at a relatively low zoom level. Engraved labels are displayed within the symbols of nodes except those with long names. Nodes with label lengths exceeding the symbol size can be shown by mandatory labels outside the nodes, such as "12DAG3Ps_PA" and "ocdACP". The label "ACCOACr" is shown as a floating label when the mouse moves on the node. B) The area marked in A) at a higher zoom level. With the node size increasing, more engraved labels are displayed and fewer mandatory labels are needed.