Thanks for the replies.
Just so I have it straight in my mind ... you really cannot configure the keyboard? Is this Visio or Office 2010?
The icons are cumbersome whether you add them to a new tolbar or use those at the bottom. My pointer is in the middle of the screen and I have to scoll to the top or bottom just to zoom in and out?
I have just found the VBA (Called Macros!) but the help system is less than ideal.
The code I am trying at the moment is
Sub zoomin()
Window.Zoom = Window.Zoom + 25
End Sub
Sub zoomout()
Window.Zoom = Window.Zoom - 25
End Sub
but it giving a runtime error '424' Object required.
As far as I can tell, 'Window' is an object. 'Me' and 'ActiveDocument' do not have the zoom property.
As an added irritation, I cannot set the macro's shortcut to - / + becasue these are not letters. It would appear that only alphabetic letters can be used (a work around for this seemingly abitrary limit would also be welcome!)