NOVELTY - The system (1) has a drill string (4) to be rotated to form a bore-hole (2) in an earthen formation (3) during a drilling operation. The drill string is operated according to drilling parameters to form the bore-hole in the earthen formation. Sensors (30, 32, 51, 52) obtain drilling data during the operation. A computing device (100) includes a graphical user interface that displays a visual indication of a first set of operating ranges for the drilling parameters and a visual indication of another set of updated operating ranges for the drilling parameters subsequent to the duration of time.    USE - Drilling system for forming a bore-hole in an earthen formation i.e. gas, oil or geothermal formation during drilling operation i.e. underground drilling operation.    ADVANTAGE - The operating ranges are provided for the drilling parameters that can yield highest rate-of-penetration and lowest wear on drill string components. The computing device can cause the optimized operation ranges to automatically update based on drilling conditions when the drilling operation continues.    DETAILED DESCRIPTION - The drilling parameters are selected from a group consisting of weight-on-bit parameters, rate-of-penetration parameters, differential pressure parameters, drill bit rotational speed parameters and drilling mud flow rate parameters. The operating ranges are selected from a group consisting of optimized operating ranges, normal operating ranges, high operating ranges, severe operating ranges and critical operation ranges. The visual indication is dial e.g. curvilinear dial and linear dial and different color. INDEPENDENT CLAIMS are also included for the following:    (1) a computer implemented method for monitoring and displaying drilling parameters for a drill string to form a borehole in an earthen formation    (2) a non-transitory tangible computer-readable storage medium comprising a set of instructions for monitoring and displaying drilling parameters for a drill string to form a borehole in an earthen formation.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a drilling system.    Drilling system (1)    Bore-hole (2)    Earthen formation (3)    Drill string (4)    Sensors (30, 32, 51, 52)    Computing device (100)