Imagine that you are installing any hardware and could not find a specific step out of 100 pages of manually. How you will feel at that time? You will get frustrated as you are not able to find a simple step but it is not your fault. It is the problem with the guide which is provided to you. What if there could be a reference guide who contains all steps needed for installing that hardware in bullets point and with images in front of you, with such approach it will make easier for you to install the product without any problem and also saves time for you. Reference guides are a tool for the person who needs to know just enough set of steps required to get a job done without going through or reading all the instruction provided in the entire manual.
Forms of Reference guide: They can be made of professionally hand written from business card size or laminated card or size of index card or punch list or it also available in form of booklets as required
But today with advance in technology person do not need hand written reference guide they need guides which are available for download from internet at any time because hand written reference guide are usually paper base which may be tear off at any time but downloadable reference guide are easy to find and easily available at any time