Handspring Treo 270 User Guide

Chapter 6Page 151
2. Tap the remaining pick lists and select the other three cities you want to display.
Tip: You can temporarily display the day and time for any other city by tapping the city’s 
location on the map display. 
Adding cities
If the city you want to display is not in the predefined list, you can use the Edit Cities command 
to add it.
To add a city to the list:
1. Press Menu  .
2. Under Options, select Edit Cities (/E).
3. Tap New.
4. Enter the city name and other information.
5. Hold...

Page 152 Application-Specific Tasks
Calculator
Calculator includes two operating modes: Basic and Advanced. In Basic mode you can perform 
simple mathematical calculations. In Advanced mode you can access scientific functions and 
perform sophisticated math calculations. This section explains how to select the operating mode 
and use the buttons and menu options available in each mode.
Selecting the Calculator mode
The Toggle Mode command enables you to choose whether you want to work in Basic Calculator...

Chapter 6Page 153
Displaying Recent Calculations
The Basic Calculator’s Recent Calculations command enables you to review the last series of 
calculations and is particularly useful for confirming a series of “chain” calculations.
To display recent calculations:
1. Press Menu  .
2. Under Options, select Recent Calculations (/I).
3. After you finish reviewing the calculations, hold Option   and press Return   to finish.
Using the Advanced Calculator mode
The Advanced Calculator screen consists of three...

Page 154 Application-Specific Tasks
Primary buttons
Math buttons
Clears the entire calculation and enables you to begin a fresh calculation.
Clears the last digit you entered. Use this button if you make a mistake while 
entering a number in the middle of a calculation. This button enables you to re-
enter the number without starting the calculation over.
Enters an exponent symbol in the calculation.
Opens the Constants dialog box where you can select a constant to include in the 
calculation. 
Opens the...

Chapter 6Page 155
Trigonometry buttons
Finance buttons
Finance buttons enable you to find an unknown variable value based on a group of known variable 
values. For example, to calculate the monthly payment for a 30-year home loan of $100,000 with 
an annual interest rate of 8%, you would enter the following variables:
nPayments/year = 12
nN = 360 (30 years x 12 months)
nAPR = 8
nPV = 100,000
nFV = 0
Using these variables, the answer would be -733.76 per month.
To solve this example:
1. Enter a value and...

Page 156 Application-Specific Tasks
nPV = 100,000
nFV = 0
2. Enter 12 and tap the P/Yr button to enter the number of payments per year.
3. Tap Edit.
4. Tap the Pmt line and erase all values on the line including zero.
5. Tap Solve.
6. Hold Option   and press Return   to finish.
You can use a similar process to solve other financial equations by entering four of the variables 
to find the value of the fifth variable.
Stores the current number as the total number of payments over the life of the 
loan....

Chapter 6Page 157
Logic buttons
Statistics buttons
Shifts the value to the left and fills the new places with zeros.
Enters D in a hexadecimal calculation.
Enters E in a hexadecimal calculation.
Enters F in a hexadecimal calculation.
Calculates bit-by-bit commonalities between two arguments.
Calculates bit-by-bit unique occurrences in two arguments.
Shifts the sign bit to the right in signed mode.
Enters A in a hexadecimal calculation.
Enters B in a hexadecimal calculation.
Enters C in a hexadecimal...

Page 158 Application-Specific Tasks
Weight/Temp buttons
Length buttons
Generates a random number between 0 and 32767 and then divides this number 
by 32768 to generate a random fraction between 0 and .99997.
Returns the number of combinations of n items taken m at a time.
Returns the number of permutations of n items taken m at a time.
Indicates the current value is entered in ounces. When you tap this button after 
tapping another unit of measure, it converts the value to ounces.
Indicates the current...

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Area buttons
Indicates the current value is entered in nautical miles. When you tap this button 
after tapping another unit of measure, it converts the value to nautical miles.
Indicates the current value is entered in millimeters. When you tap this button after 
tapping another unit of measure, it converts the value to millimeters.
Indicates the current value is entered in centimeters. When you tap this button 
after tapping another unit of measure, it converts the value to...

Page 160 Application-Specific Tasks
Volume buttons
Creating a custom view
You can modify any existing Advanced Calculator view to create your own view. While 
customizing a view, you can change the button names as well as the button definitions.
To create a custom view:
1. From the Advanced Calculator screen, press Menu  .
2. Under Program, select Export (/E).
3. Tap the pick list and select the view you want to modify.
4. Tap Export.
5. Hold Option   and press Return   twice. 
6. In Memo Pad, open the...