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Appendix B: Reference Information 386
4. Select TRANSMIT to send the file.
Brightness Feature
If the brightness setting is too dark (set to 9) or too dim (set to 0) the unit may appear as if it is
malfunctioning or turned off. To adjust the brightness, press and release y, and then press and hold }
or . The TI-84 Plus C retains the brightness setting in memory when it is turned off.
Automatic Dimming
The TI-84 Plus C has an automatic dimming feature. To help prolong battery life, the screen dims after
90 seconds of no activity. Press É to return the screen to the preset brightness setting. Pressing É
does not affect any calculations, cursors, or error messages.
TI-84 Plus C Identification Code
Your graphing calculator has a unique identification (ID) code that you should record and keep. You
can use this 14 digit ID to register your calculator at education.ti.com or identify your calculator in the
event that it is lost or stolen. A valid ID includes numbers 0 through 9 and the letters A through F.
You can view the calculator’s Operating System, Product Number, ID, and Certificate Revision Number
from the
About screen. To display the About screen, press y L and then select 1:About.
Your unique product ID code: _____________________________
Backups
Your TI-84 Plus C is similar to a computer, in that it stores files and Apps that are important to you. It is
always a good idea to back up your graphing calculator device files and Apps using the TI Connect™
software and a USB computer cable. You can find the specific procedures for backing up your
calculator’s device files and Apps in the TI Connect™ Help file.
TI Connect™ for PC and TI Connect™ for Mac each have different file types to back up your TI-84 Plus C
to your PC or Mac computer. You can also backup your TI-84 Plus C to another TI-84 Plus C, press
y8 and then select G:Back Up...
Apps
TI-84 Plus C Software Applications (Apps) is software that you can add to your calculator in the same
way you would add software to your computer. Apps let you customize your calculator for peak
performance in specific areas of study. You can find apps for the TI-84 Plus C at
education.ti.com/go/download.
393


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