111The pop up tools of the PV Unit provide you with instant access to a calculator,a calendar, and a clock whenever you need them.Chapter9 Pop Up ToolsDisplaying the Pop Up Tool Screen ............................................. 112Using the Clock Screen ................................................................. 112To display the clock screen ....................................................................... 113To make one of the clocks the main clock ................................................ 113To select a time zone city ......................................................................... 114To switch between standard time and daylight saving time (DST) .......... 114Using the Calculator Screen ......................................................... 115To display the calculator ........................................................................... 115Calculator Keys ........................................................................................ 116To perform calculations ............................................................................ 117To perform constant calculations .............................................................. 118To correct entries during calculations ....................................................... 118About calculation errors ........................................................................... 119To clear an error ........................................................................................ 119Next Appointment Screen ............................................................. 120To display the next appointment screen .................................................... 1209