Very much in favour of a faster, easier way of toggling between the windows within MYOB. I also find cumbersome and adding on additional time when doing a lot of entries.
In Adobe or Microsoft you can go between different pages/slides using the arrows or spacebar. I know nothing about computer design. Is anything like that translatable? A keyboard shortcut to toggle between the the MYOB windows would be ideal.
The extra button is a good idea.
I wonder alternately about having an option for thumbnails on the side like in Powerpoint where you can see and select different slides, perhaps which comes out from hiding when you put the mouse over it like docks can, as I find I need all the window space I can get when using the intray, enlarged docs, purchase entry and pay bills open often all at once.