https://stackoverflow.com/questions/39155656/i-need-bigger-font-in-python-idle/39156068#39156068 is about getting a larger font size than 22 for classroom projection.  I think configdialog.py should be extended something as follows (about line 1000).

    self.optMenuFontSize.SetMenu(('7', '8', '9', '10', '11', '12', '13',
                                  '14', '16', '18', '20', '22',
                                  '25', '30', '35', '40'), fontSize )
 
I think any new key or wheel should change by 1 over a large range rather than being constrained to the values on the list.  I will try to look at the patches before 3.6.  Tests should also be added.