is there really multi line buttons or are they multiple normal buttons?

I've never seen any multi-line buttons.

You would likely create 1 button that is clickable, as the background which is the size you want. Then create another 'button' that is not clickable that has the contents of Line1. and underneath it create another non-clickable button with the contents of Line2... -> as many lines as you need.

When create the lines with content you will want to set the button color to whatever value makes it invisible. It is documented in InSim.txt

Good luck.

i know with lfs lapper u can have 1 button (or it looks like 1) with more then 1 line of stuff i wanted to know if it really was 1 button or not

As I said, there would likely be one clickable button with several other 'line' "buttons" to make it work. It would look like there are multiple pieces of text in the button; but those 'text' objects are not clickable, instead there is a clickable button behind it.

I don't know another way to word it. In simple; no there is no such thing as a multiline button, but there is way to achieve the effect using 3+ buttons.