Step1: Click the button , and the "sub browser" window as bellow will appear

Step 2: The above "Sub Browser" window has two sub-windows. The upper window shows all projects, groups, and source files in the current workspace. Users can select a project, group or a source file in the upper window, then the subroutines/functions defined in the selected project/group/file will be listed in the lower window. "Double click" the name of the subroutine/function, then VFTool will take you to the definition of the subroutine/function.

Tips: The subroutines in the lower window are sorted by name, and press down keyboard will jump to the line beginning with the character. For example, if you press "mem" in the bellow window, the focus will jump to the line begin with "mem". This is helpful to locate a subroutine in a long list.