Unhide One Row From Many Hidden Rows

I am trying to create a macro to unhide only a row at a time, from around 150 hidden rows altogether. It is basically to give the effect of adding extra rows to a "table" that a user could then input with new data (I have to do this way according to other set-up in the workbook), but this isn't very important to do with this question. When I do a Format<Row<Unhide from the Excel menu, it always unhides ALL of the hidden rows. I have fiddled around but can't seem to find a way to avoid this happening, all I want is for just one row to unhide. I thought it might depend what cell/s I had highlighted, but I haven't found a way that makes it work.