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[Carsen]

(07-07-2020 04:32 PM)franz.b Wrote:  Of course, each of us has his preferences and habits. But the HIST key is exactly the same as the up arrow key. it's an absolutely useless duplicate, Of course, each of us has his preferences and habits. But the HIST key is exactly the same as the up arrow key. it is an absolutely useless duplication, if it has no other uses unknown to me.

Not quite. The HIST key activates the interactive stack while in Input forms like TVM or numerical solver.

Also, it is useful in Algebraic mode as you need the HIST key to access entries in the stack while the command line is active.