Could i get some clarification on a tutorial?

I'm on part 9 of the cash course 2 tutorial
http://www.stencyl.com/help/viewArticle/179/
According to the chat below some of the instructions are for an older version but as im new to this i dont know what to replace the outdated comand with.
could someone please look at the screenshot in the tutorial and tell me what i should put instead of the blue box "width of self"
i found the "x of self" box but there is no option for width in the dropdown
having tried every option in the dropdown (shown in pic attached) to no success i was hoping someone here could lend some advice.

new to  stencil so please forgive if an obvious answer is staring me in the face.

That is because the block you are using a position block which only contain data for your position on screen. There is a search bar you can simply write down the block you are looking for, which is in this case "width of self"

Thanks for the tip iv got it working now,
that search bar is now my favourite part of the interface.

it has always bin my favorite haha.
if you check out my video tutorials you see that i barely use the "normal" way of picking blocks anymore