Apple IPhone IOS 42 And 43 User Guide

Clock
18
World Clocks
You can add clocks to show the time in other major cities and time zones around  
the world.
View clocks:   Tap World Clock.
If the clock face is white, it’s daytime in that city. If the clock face is black, it’s nighttime. 
If you have more than four clocks, flick to scroll through them.
Add a clock:   
 1 Tap World Clock.
 2 Tap , then type the name of a city.
Cities matching what you’ve typed appear below.
 3 Tap a city to add a clock for that city.
If you don’t see the city...

Alarms
You can set multiple alarms. Set each alarm to repeat on days you specify, or to sound 
only once.
Set an alarm:  
 1 Tap Alarm and tap .
 2 Adjust any of the following settings:
 ÂTo set the alarm to repeat on certain days, tap Repeat and choose the days.
 ÂTo choose the ringtone that sounds when the alarm goes off, tap Sound.
 ÂTo set whether the alarm gives you the option to hit snooze, turn Snooze on or off.  
If Snooze is on and you tap Snooze when the alarm sounds, the alarm stops and 
then...

Stopwatch
Use the stopwatch to time an event:  
 1 Tap Stopwatch.
 2 Tap Start to start the stopwatch.
 ÂTo record lap times, tap Lap after each lap.
 ÂTo pause the stopwatch, tap Stop. Tap Start to resume.
 ÂTo reset the stopwatch, tap Reset when the stopwatch is paused.
If you start the stopwatch and switch to another app, the stopwatch keeps running.
Timer
Set the timer:   Tap Timer, then flick to set the number of hours and minutes. Tap Start 
to start the timer.
Choose the sound:   Tap When Timer...

Calculator
19
Using the Calculator
Tap numbers and functions in Calculator just as you would with a standard calculator. 
When you tap the add, subtract, multiply, or divide button, a white ring appears 
around the button to let you know the operation to be carried out. Rotate iPhone to 
get an expanded scientific calculator.
Standard Memory Functions
 ÂC:  Tap to clear the displayed number.
 ÂMC:   Tap to clear the memory.
 ÂM+:   Tap to add the displayed number to the number in memory. If no number is...

Scientific Calculator Keys
Rotate iPhone to landscape orientation to display the scientific calculator.
2ndChanges the trigonometric buttons (sin, cos, tan, sinh, cosh, and tanh) to their inverse 
functions (sin-1, cos-1, tan-1, sinh-1, cosh-1, and tanh-1). It also changes ln to log2, and ex to 
2x. Tap 2nd again to return the buttons to their original functions.
( Opens a parenthetical expression. Expressions can be nested.
) Closes a parenthetical expression.
% Calculates percentages, adds markups, and...

logReturns the log base 10 of a value.
sin Calculates the sine of a value.
sin
-1Calculates the arc sine of a value. (Available when the 2nd button is tapped.)
cos Calculates the cosine of a value.
cos
-1Calculates the arc cosine of a value. (Available when the 2nd button is tapped.)
tan Calculates the tangent of a value.
tan
-1Calculates the arc tangent of a value. (Available when the 2nd button is tapped.)
ln Calculates the natural log of a value.
log2 Calculates the log base 2. (Available when the 2nd...

Compass
20
Getting Compass Readings
The built-in compass shows which direction you’re facing, along with the geographical 
coordinates of your current location. You can choose magnetic north, or have Compass 
adjust the declination to show true north.
Important:  The accuracy of the digital compass may be negatively affected by 
magnetic or other environmental interference, including interference caused by the 
close proximity of the magnets contained in the iPhone earbuds. The digital compass 
should be...

Calibrate iPhone:  Wave iPhone in a figure eight. You may be asked to move away 
from a source of interference.
See the direction you’re facing:   Hold iPhone level to the ground. The compass needle 
rotates to point north. Your current direction appears at the top of the screen. The 
coordinates of your current location are displayed at the bottom of the screen.
Switch between true north and magnetic north:   Tap  and tap the setting you want.
Compass and Maps
The Compass app lets you find your current...

Show the direction you’re facing:  In Maps, tap  twice. The icon changes to . The 
angle shows the accuracy of the compass reading—the smaller the angle, the greater 
the accuracy.
See “Finding and Viewing Locations” on page 13 8 .
15 9Chapter 20    Compass 

Voice Memos
21
Recording Voice Memos
Voice Memos lets you use iPhone as a portable recording device using the built-in 
microphone, iPhone or Bluetooth headset mic, or supported external microphone.
Note:  External microphones must be designed to work with the iPhone headset jack 
or Dock Connector. These include Apple-branded earbuds and authorized third-party 
accessories marked with the Apple “Made for iPhone” or “Works with iPhone” logo.
You can adjust the recording level by moving the microphone...