The two features of this article can be found on the toolbar, if not, you can:
Go to Window - Customize Perspective - Commands, check the respective selection boxes to launch a specific feature
Mark Occurrences (Toolbar icon)
Start by checking Editor Presentation
Function: Highlight all the events in the source code in the source code, facilitate tracking of the declared instance during the encoding process.
Show Source of SELECTED Element Only (Toolbar Icon)
By checking the Java Editor Presentation startup feature: only the code of the specific class, method is displayed in the editor, very practical when the encoding is longer, and
