Select Set->Set Line, or select Line breakpoint from the prefix area popup menu, to set a line breakpoint at a particular line number. In the dialog that appears, you can specify what executable and source file you want to set the breakpoint in. If the source code consists of several files (that is, if one or more files include other files) you can select which source file the breakpoint should be set in from the Include File pulldown list.
Type a line number in the Line entry field. The breakpoint is set on that line number.
More information is available on the following entry field items: