As I was reviewing the Smath worksheet referred to in this recently posted thread:
ImplicitFunctionGrapher

I was reminded that there is no neat and tidy way to specify an "if" clause without including "else". This would be a good option to add sometime in the future.

You're absolutely right. Now I also see, how it is important to implement possibility to insert page breaks to the worksheets for further printing. This is another thing to be done.