Spoiler advanced instructions?

[ParadaCarleton]

I'm not sure if there's a way to do this, but right now, the advanced instructions add a lot to the length of some sections; would it make sense to spoiler them to avoid scaring off newer users?

[gdalle]

It's a good idea, I guess it can be done by tweaking the CSS here. Feel free to take a crack at it!

[adrhill]

Maybe this could be done with a CSS "collapsible" to make the page less long but still show the topic of the advanced content?