The present invention concerns methods and apparatus for enabling manual control over selection of a value for at least one operating parameter of a computer system resource. Manual control is enabled by de-coupling a pointer of a graphical indicator and control from an automated system advisor. During automated operation, the automated system advisor selects the value for the parameter of the computer system resource as indicated on a scale of the graphical indicator and control by the pointer. When the pointer of the graphical indicator is under manual control, a user can select the value of the at least one operating parameter of the computer system resource using the pointer of the graphical indicator and control. The present invention also concerns methods and apparatus for disabling manual control over selection of a value for at least one operating parameter of a computer system resource by re-coupling the pointer to an automated system advisor. The present invention further concerns hybrid control modes that permit users to exercise a degree of control over operations of an automated selection process in a graphical indicator and control.