For all the users who are not sure, here is a helpful guide to the common buttons/images in a post:
You will see this image in the user bar on the left if the user is not online currently.
This is the button you will see when the user is online.
If you see people making great posts and giving good information click on this to give them more reputation so they stand out as knowledgeable and trustworthy.
If a post violates the forum rules or is somehow questionable click on this button inside that post to bring it to the attention of the moderators and administrators.
This icon represents your reputation. The bigger it is the more people find you and your advice useful.
If you want to quote multiple people in your posts click on this button in each post that you are interested in quoting then hit
at the bottom of the page to start a new post that has all the quotes posts in it for you.