a fourth self leveling foot 935 and the page counter 108 the first internal level 921 is coupled to the first self leveling foot 931 the second internal level 922 is coupled to the second self leveling foot 932 the third internal level 923 is coupled to the third self leveling foot 933 and the fourth internal level 924 is coupled to the fourth self leveling foot the cpu 290 the rfid reader 5 and provides output to the end user the position of each of the self leveling feet is measured by the internal level associated with the respective foot and this measurement is provided to the cpu 290 to be used to calculate the height adjustment needed to obtain a level base for the hand held device 1 the level base ensures that the led line guide lights 102 project straight lines onto the writing surface the battery 91 with a corresponding battery charger 90 is the power source for the cpu 290 fig1 illustrates a computer system upon which an embodiment of a controller for controlling the information panel may be implemented according to exemplary embodiments is described the handheld device 1 includes a cpu 300 an example of processing circuitry which performs the processes described above the process data and instructions may be stored in memory 302 these processes and instructions may also be stored on a storage medium disk 304 such as a hard drive hdd or portable storage medium or may be stored remotely further the claimed.