Numbers 6.1 problems

I suspect you have accidentally moved the table upwards, placing those unreachable rows outside the top boundary of the Sheet.

Select any cell to activate the table, then click and hold the circle at the intersection of the column and row reference headers and drag down to bring the table back onto the sheet.

Regards,

Barry

There's a limit to the size of a Table. For Numbers 6, the column limit for a Table is 255 and rows top out around 63000, but you'll find Numbers response dreadfully s-l-o-o-o-w long before reaching these limits.

Current versions can have 1000 columns and i000000 rows in a table, if (my)memory serves.

I don't know that Apple has ever stated a size limit for a sreadsheet (ie. the whole document).

Regards,

Barry