When a literature search completes, the network nodes containing user-entered search terms are highlighted (see figure below).
Frequently the labels in the highlighted nodes will not exactly match the search terms entered into the Terms panel. This typically happens when a term entered into the Terms panel is an alias for a "formal name" that is in the user context file. For example, in the figure above, the term "tp53" is not one of the originally entered search terms, but one of its aliases, "p53", is in the list of terms in the Terms pane. All of the aliases for a Node's formal name are displayed in the tooltip that appears when you hover the mouse over the Node, so you can identify your originally entered term via that tooltip.
The highlighting of search terms works by Node selection, so if you do anything that de-selects that Node, such as clicking on an empty spot on the canvas, the highlighting will disappear. When this happens, you can highlight search terms again in one of the following two ways. The first way is to bring up the context menu on a Node or Edge in the Network (e.g. by right-clicking in Windows systems) and select the Evidence from Literature -> Highlight Search Terms menu item. The second way to view literature references is On the Select menu, select the Evidence from Literature -> Highlight Search Terms menu item.