Hey
DKFirelord, there's no real guide for these things on the site but they're quite simple once you know them so I can explain them to you right now.
To post an image, copy the URL of the image (you can usually find the URL to any image by right clicking it and then pressing something like "view image" or "open image in new tab" depending on the browser). Then in the posting box, click the little picture of mountains right next to the smiley face that looks like this:
and then you'll be prompted to paste the image URL. You can also use tags but this is just the easiest way since you'll be able to see how the picture looks in your post right away.
To link someone's name (this will also give them an alert) just put @ before their name. When the post goes through, it will be changed into a tag.
To use hide tags, you simply use the hide tag, for example:
Code:
[HIDE=name of what you're hiding]
stuff you want to hide here
[/HIDE]
So this would look something like: