Tabs

Call stack tab
When the Callstack tab is selected, the following buttons appear

:

Update | Lists all stack frames beginning with the current one and going up to the main function entry (the list is also called call hierarchy). Frames for which symbol information is loaded are displayed in boldface.
Up | Goes one stack frame up in the call hierarchy. A reusable Source Editor is automatically positioned at the source location of the new stack frame.
Down | Goes one stack frame down in the call hierarchy. A reusable Source Editor is automatically positioned at the source location of the new stack frame.
Locals | Displays all local variables of the current stack frame in the main view.

Break points tab
The Breakpoints tab displays a list of currently active breakpoints and allows their deletion or loading of their source code into a Source Editor. When the Breakpoints tab is selected, the following buttons appear:

Show | Loads the source containing the selected breakpoint into a Source Editor.
Clear | Deletes the selected breakpoint.
Status | Displays status information about the breakpoints in the main view.

Display tab
When the Display tab is selected, the following buttons appear:

Undisplay | Deletes a variable from the list of displayed variables. The selection must refer to a displayed variable.
Status | Displays status information about the displayed variables in the main view.