I don't mean to be rude, just asking a question:
Did you try to look for tutorials on how to do it before posting, or did you post this immediately?
I'm asking because I've been seeing more and more people asking the same things. Of course, with the popularity of Construct and HTML5 games overall a larger number of new users come to the forum avid for information, but right now it is a bit difficult to find tutorials on a specific topic, so I'm wondering if this could be related.
Now, off-topic, I think adding categories to the tutorials, along with a category selector, would be a great addition (i.e. Begginer Tuts / Expressions / Char. Movement / Scores / Network / Publishing, etc).