23To-do listSelect Menu > Organizer > To-do list. The to-do list is displayed and sorted by priority.Select Options, and you may add, delete, or send a note; mark the note as done; or sort theto-do list by deadline.NotesTo write and send notes, select Menu > Organizer > Notes. To make a note if no note is added,select Add note; otherwise, select Options > Make a note. Write the note, and select Save.CalculatorThe calculator in your phone provides basic arithmetic and trigonometric functions, calculatesthe square and the square root, the inverse of a number, and converts currency values.Note: This calculator has limited accuracy and is designed for simple calculations.CalculationsSelect Menu > Organizer > Calculator. When 0 is displayed on the screen, enter the firstnumber in the calculation. Press # for a decimal point. Scroll to the desired operation orfunction, or select it from Options. Enter the second number. Repeat this sequence as manytimes as necessary.Other optionsYou can also do scientific and loan calculations with the calculator.Countdown timerTo activate the countdown timer, select Menu > Organizer > Timer, enter the alarm time,and write a note that is displayed when the time expires. To start the timer, select Start.To change the countdown time, select Change time. To stop the timer, select Stop timer.StopwatchYou can measure time, take intermediate times or lap times using the stopwatch. Duringtiming, the other functions of the phone can be used. Using the stopwatch or allowing it torun in the background when using other features increases the demand on battery powerand reduces the battery life.Select Menu > Organizer > Stopwatch and from the following options:• Split timing—to take intermediate times. To start the time observation, select Start.Select Split every time that you want to take an intermediate time. To stop the timeobservation, select Stop. To save the measured time, select Save, enter a name for thetime and select OK. To start the time observation again, select Options > Start. The newtime is added to the previous time. To reset the time without saving it, select Options >Reset > Yes.