To give another deviant a direct link to this FAQ answer, use the following code in your comment or forum post:
How can I create links to other deviants, deviations, or websites?
There are a few formats you can use, either a link of the users name, displaying the members avatar, or by linking with a personal description.
:iconusername: will display the member's or group's avatar as a link to their page. Remember, however, that the limit for posting blocks of avatars is sixty four per post, and this will not work in signatures.
:devusername: -or- @username will give you the member's or group's name as a link.
There are HTML tags which can be used to add a link to something everywhere on deviantART. The standard link will show the first part of the URL truncated by an ellipsis (http://deviantart.com/deviaÖ). This is achieved by simply pasting a URL to the page, For example, view one of your images, copy the address down and then just paste it wherever. The second method is to use HREF tags (which will NOT work in the shout box) to give your link a name, for example, copy the address to the image down, and then use this format: <a href="Image URL address">Name of Image</a>
To link images in your journal please follow the code here, and replace the URL Address and Image URL Address with the proper information: <a href="URL address"><img src="Image URL address" alt="Name of Image" /></a>
To link to images found on deviantART in your journal please visit the deviation page and in the sidebar to the right under the "share" or "details" header please copy the code that starts with ":thumb:". Once you have copied that :thumb: code you can paste it in to your journal and it will automatically generate a thumbnail image for that deviation when the journal is displayed on site.
To embed a media widget please use the following code: <da:embedprofile="video type" id="ID of the video" /> For example:
dA Film: <da:embed profile="film" id="308380200" />
Soundcloud: <da:embed profile="soundcloud" id="79222021"> (Note: That ID is the number after /tracks/ in Soundcloud's own embed code)
Pop up descriptions (tooltips)
You can also add popup descriptions with a dotted underline to your links by using the <acronym> tag, and close using the </acronym> tag, the format for this is the following. <acronym title="popup text"><a href="link Url">link description</a></acronym>