I think by default the monkey button is located on the Add-on bar. If you don't normally display the Add-on bar, you could drag it to another location.

If you right-click a blank area of the tab bar and choose Customize..., then you should see all your bars and you can drag and drop between them. If there is no monkey to be found, check the large button palette and see whether it is in there.

Any luck?

Thank You Very much it worked :)