Call Back Equation Lib Menu

[CMarangon]

Hello!

(1 minute reading text)

I was making some calculus, testing and remember some formulas, so, in HP50, I accessed EQ LIB.
My dog was barking loud and I went check what was happening.

When I came back I no longer remembered which equation I had used.
Is there something like LAST EQ LIB USED, able to return to the beginning of the operation?

I stopped here:


I need to return to


Note:
these screenshoots are merely illustrative.