How can I hide spoilers
 

I've seen before in some posts where sections are covered in black lines that disappear when you move the cursor over them. I just want to know if/how I can do that. Only reason I'm asking is I'm going to make a post in 'What are you Watching?' about how I finished watching Blade.

Use the spoiler tag, which is [spoiler][/spoiler] Like this

THANKYOU! I've been wondering how to do that for ages! I always thought it was a button. Anyway, thanks again!

Anytime :)