"What I meant was, where in the site can someone easily find that information?"
The answer is, there isn't.
"Is it at the top of the forum lists in big bold type so you cannot miss it?"
Obviously not, since you've had to ask the question, and I doubt that there ever will be.
Since the functionality of which you speak, is not unique to this or any other web site. It is unique to the respective hardware and/or software utilized by any given individual accessing any given website.
This of course can encompass the whole range of the various main-frame computer hardware and software and the various terminal types connected to them. To the various brands and models within the brands of personal computers and the types and versions of software being used on them. Then there's the various keyboard layouts used for the many different languages found around the world, not to mention more than one hardware keyboard layout (e.g. 'QWERTY' & 'Dvorak' to mention but two.).
So to attempt to answer that type of question would be very inefficient and very likely confusing to many individuals. In the previous case you mentioned, I took a chance and answered Scot's query regarding the current subject at hand, because I was fairly sure of the computer hardware & software that he uses. Then again here in this topic when the same query was raised again, I again took a chance and provided the same answer hoping that it would prove useful. However, if the individual say uses a Mac type computer I don't have the faintest idea if that system has any keys labeled as I described. In your case, again I took the chance and lucked out it seems.
As an allegory, most all motor vehicles have windshield/screen wipers, but the manner that any given manufacturer chooses to implement turning them On & Off, or adjusting there speed varies from brand to brand, not to mention from model to model within a certain brand. Yet you don't find road signs placed along the highways and byways, informing individuals driving specific types of motor vehicles how to turn the wipers on or off, or the fine points of adjusting the speed at which they oscillate back and forth. Why? Because it's expected that it is incumbent on any and every individual that chooses to operate a motor vehicle. To learn the manner in which each of the devices they will need to safely operate the vehicle are controlled in that specific brand/model of vehicle.
As a possible solution for you and or anyone else happening to read this topic and finds that the information to be of help. Then I would suggest that all would create a shortcut/bookmark/Favorites link to this topic in you local browser and label it however you find best to remind yourself what it's for.
Since you chose to describe yourself as a "computer illiterates like me", then maybe a more efficient and less technologically based solution would be to take an appropriately sized piece of paper, copy the above instructions, (which you stated you found easy to follow and understand) to the piece of paper and tape them to the edge of your monitor where they'll be a ready reference for you by simply glancing at the note when needed.