The quickest way to set or clear a breakpoint is to press F9. This toggles the breakpoint for the current line.
The breakpoints functionality in SlickEdit® Core integrates with the Eclipse Breakpoints view. This view displays a list of breakpoints and lets you easily add, remove, and activate them. To display the Breakpoints view, click Window → Show View → Other, expand Debug and double-click Breakpoints. See "Breakpoints view" in the Eclipse online Help for more information.
For help on setting conditional breakpoints, see the Eclipse Help on "Managing conditional breakpoints".