Are there any free tutorials to quickly learn to use more tools offered by Pixlr? Where can they be accessed?

I've used tools that I'm familiar with from other photo editing programs, but I'm certainly not familiar with all Pixlr has to offer. For example just looking at the side bar: liquefy, add elements, layout & template. Is there any quick overview of semi-advanced tools offered? I know I can click through each tool on my own to experiment, but that would be time-consuming, and part of what I love about Pixlr is that it is very quick to accomplish what I want.