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Home >Online Product Documentation >Table of Contents >Using Breakpoints Using BreakpointsThe Stylus Studio debugger allows you to interrupt XQuery processing to gather information about variables and XQuery expression execution at particular points. Inserting BreakpointsTo insert a breakpoint:
1. In the XQuery in which you want to set a breakpoint, place your cursor where you want the breakpoint to be.
2. Click Toggle Breakpoint  or press F9. Stylus Studio inserts a blank stop sign 
to the left of the line with the breakpoint.
Removing BreakpointsTo remove a breakpoint:
1. Click in the line that has the breakpoint.
2. Press F9 or click Toggle Breakpoint.
Alternative: In the Stylus Studio tool bar, click Breakpoints Start Debugging
When your XQuery has one or more breakpoints set, start processing by clicking Start Debugging
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to display a list of breakpoints in all open files. You can selectively remove one or more, remove them all, or jump to one of them.
or pressing F5. When Stylus Studio reaches the first breakpoint, it suspends processing and activates the debugging tools. After you examine the information associated with that breakpoint (see 
or press F11.
or press F10.
or press Shift+F11.
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in the Stylus Studio tool bar, or click Cancel in the lower right corner of the XQuery editor, or press Shift+F5. 
to suspend XQuery processing. Stylus Studio flags the line it was processing when you clicked Pause.
