Clickable plus sign to display cells from another sheet?

Hello

In the past I remember seeing a spreadsheet where there was a value in a specific cell but also a Plus (+) symbol next to or within it so when somebody slicked this +, another sheet appeared over the top with data from elsewhere.

Basically I have a piece of equipment which has 12 other pieces of equipment attached to it.
I want the name of the main piece of equipment in the cell and when clicking a + sign, it pulls data from another sheet (the list of the 12 pieces attached to it) and have it appear as an 'expanded view' so to speak.
Clicking the plus symbol again removes this expanded view and the other data vanishes from view.

Possible?

Im sure I have seen it before

Excel 2007 by the way

Thanks

It sounds like you're referring to Grouping. The data wouldn't be on another sheet, it would be in hidden rows/columns. Clicking the + would reveal the hidden rows/columns.