#showtooltip

^
|
-----Put that on the very first line and it will show the tooltip and icon if you selected the question mark for the first spell in your macro.

If you prefer to have it show the tooltip for something else use the following

#showtooltip Spellname

You can get fancy with it and have something like

#showtooltip Spellname [combat]; Otherspellname

If you just want it to show nothing when you scroll over the little square you can name the macro space ie " " without the quotes. You can name every macro you have the same thing, it'll still make the little tooltip box but no name will appear. It just seemed as thought you were asking for a macro to show the information that would be present had you just dragged the spell onto the bar.

I hope that was all in the right direction, I'm going on a guess mostly, just didn't seem like you are a native english speaker and this what the kind of thing you were asking for. If I'm wrong I'm terribly sorry...