Take a Screenshot:

Hold down the home button (bottom), then click on the on/off button (top right) and you will capture whatever is on the screen. The image will be added to your photo album so you can email or text it.

For example:

You check the 101 eastbound before meeting your husband for lunch, and to your dismay find that it is red all the way. Instead of calling & explaining while you’ll be late… just take a screenshot of the page and text it to him so he can see for himself!