Do you want to hide rows/columns? I do this when publishing or sharing a sheet for people to view and I don't want them to see email addresses or other confidential information.
To hide a column:
Click on the arrow at the top of a column.
Choose Hide Column.
The column is now hidden from view.
To get it back, click on the arrows that surround the hidden column.
To hide a row:
Right Click on the row number.
Choose Hide Row.
The row is now hidden from view.
To get it back, click on the arrows that surround the hidden row.