Symbol On Laptop Keyboard....

[AliceTickband]

on the bottom row of my hp laptop there is a key next to alt gr which has on it a small bold rectangle with one horizontal line above it and three horizontal lines below it....

I have been trying to find out what this does to no avail........any ideas?

[ChuckFickens]

http://en.wikipedia.org/wiki/Menu_key

[AliceTickband]

ta muchly CF