Ever had to make that tough decision between having:
1) No instructions on your data viz (to save space, but risk users not knowing how to use it)?
2) Dedicating a large area of your viz to include detailed instructions (but then it gets in the way of your viz)?
You can have your cake and eat it, by making help icons! There are several written tutorial on how to make these, but no video tutorials. So if videos are more your jam, I've made this 60 second tutorial video on how to make them. For more details, click here.