How do you do this?

[steveengland]

Some gallerys have a main image with a smaller thumbnail underneath?
How do you do this?
Kind regards
Steve

[unexplained_bacon]

This is simplest:
Put the link into the comments section:
a href="http://www.pbase.com/image/xxxxxx.jpg"><img src="/xxxxxx/(size).jpg"></a>
Note that the above is missing the first "<" so that PBase shows the whole thing.