Chapter 1 Introduction 1-3IntroductionIntroductionIntroductionIntroductionIntroductionTX/RX NO. TX/RX NO. is the abbreviation used forTransaction number.TX DenotesSending.RX DenotesReceiving.In addition, this guide uses distinctive typefaces to identify buttons and information in theLCD:• The buttons you press appear in this typeface: Stop.• Information in the LCD appears in this typeface: USER SETTINGS.Customer SupportYour unit is designed with the latest technology to provide trouble-free operation. If youencounter a problem with the unit’s operation, try to solve it by using the information inChapter 13. If you cannot solve the problem or if you think your unit needs servicing, contactyour local authorised Canon dealer or the Canon help line.