Excel 2016 missing line

[Graham Tye]

Have a workbook I've been using for a long time.  Don't know what I did but on one sheet only, Excel line #1 disappeared.  Sheet now starts on line #2.  Anybody know how I can correct this?  I'm strictly amateur grade.

Regards

Graham

[#2]

The row is hidden. You can unhide it like so:
RIght-click on cell A2 and select Unhide Rows.