Question: display of differential equations....

I am using Maple 14.

Assume I have an equation of two variables, theta and psi (actually using greek letters).  Both of these is a function of time.  Lets say it is something like F:= theta^2 + 2*psidot (where "dot" means first derivative and appears in the equation either as psi with overdot or prime - have tried it both ways).

I want to use diff(F,theta) and display the result "2*theta*thetadot" (i.e. thetadot is theta with overdot) or diff(F,psidot) and display "2*psidotdot" (i.e. psi with double overdot).  I have experimented with "OPTIONS - maple extended" and typesetting rules but can't seem to work out what I want. 

Any suggestions would be greatly appreciated.




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