Here's a guide to using thumbnails on the forum:
The forum only allows for pictures up to 800 pixels wide and 1500 high to be posted. This is far too small for certain types of large images, such as maps or comic strips. Rather than using a simple text hyperlink to the larger off-site image, you can opt for a far more eye-catching thumbnail. A thumbnail is essentially an image that produces a link as you click it.
To post a thumbnail, you will need links to two images. The larger image you wish to display, and the smaller, forum-sized thumbnail to serve as the clickable hyperlink. Ideally the smaller picture should be a resized or cropped version of the original larger image.
For example, I might wish to showcase a large and illustrious map of Westeros, using the continent's most recognizable features as the thumbnail.
Start off like you would when posting a normal link, with the short code [url][/url]. (You can either type this yourself, or use the
URL button in the upper right corner of the post options.)
Insert the link to the large image inside the first brackets, after "url" followed by an equals sign.
Then insert the thumbnail as a normal image link in between the two bracket gates in the url, as you would when naming a normal text based link.
And there we have it.