In the one frame mode, only the topmost frame is retrieved by the debugger engine and displayed in the Debug view and in the debugger shell. The following figure shows selecting the one-frame mode from the Debug view.
The Show Only One Frame menu command is a two-state menu item which uses a checkmark to indicate the state. If the Show Only One Frame menu command is chosen then a checkmark appears and only one frame is displayed. The following figure shows the stack crawl in a one frame mode.
The decorator 1 in the stack frame element indicates that the stack crawl is limited to one.