What steps will show hidden rows or columns?

In order to unhide a row or column, you first need to highlight the area where the hidden row or column is located. You can tell what is hidden because the hidden numbers or letters will be missing when looking at the visible items on the spreadsheet.

After highlighting the rows or columns before and after the hidden ones, right click and choose unhide. This will bring the hidden row/column back to the screen.

the today function returns a valid value without any arguments.

the today function returns the current date based on the computer's date setting and formatted as a date. today takes no parameters, but requires that you use empty parentheses