I've lost my "Tool Shelf" and "Operator" panels

Probably silly question for most of you but I don’t find the answer on the net: how to display the “Tool Shelf” and “Operator” panels in the tool bar ? Mine have disappeared.
Many thanks,

For the Operator option press the + symbol at the bottom of the toolshelf.
For the missing Tool Shelf at the top of the panel (see image) to add tools that was removed years ago as it was basically useless and a waste of space


:eek: Thanks. I tried every single knops, but didn’t notice this “+”. Thanks.

You can also use “T” and “N”