I have someones spreadsheet that has +/- buttons on the far left,in a column
headed as 1. When (-) is clicked, a row hides. When the (+) is clicked, the
hidden row returns. Clicking the 1 column button/header makes them all (+)
(hidden), clicking the 2 column button/header makes them all (-) ( unhidden).
There also is a 3 column, but it appears to so the same thing as the 2 column.
I'd like to replicate that feature in some of my own spreadsheets, to be
able to hide & unhide certain rows, but I have no idea where to start.

Any help would be greatly appreciated.

Thanks,

Steve