Oh I have a tip here, that might have gone unheard of.
If you say, want to make a shelf-button of the "grid-on/off" function. Do this:
Hold down the Shift + Ctrl key, and klick any function from the menus. Thus making a button in the shelf, presently visible.
One can fiddle and make your own icon also, if you dont like the default icons.
I do not support Bush! Nor Saddam! Long live UN!