If the compiler finds any errors in your program, DrJava displays them in the Compiler Output tab at the bottom of the window. A summary of each error is displayed in the list, including the file name and line number. You can click on any error to highlight the corresponding line in the document itself. (Note that a file will be opened automatically if it contains errors detected by the compiler.) Similarly, if the cursor is moved to a line of code that contains an error while the Compiler Output tab is displayed, that line and the corresponding error message are highlighted. You can disable highlighting compiler errors in the source by unchecking the "Highlight Source" checkbox on the Compiler Output tab, or by closing the Compiler Output tab.