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"Freezing" evaluation Output?
[I hope people will pardon the ongoing barrage of perhaps absurd questions I keep posting; the answers are appreciated, and sometimes even useful.] Is there any simple programmable way to "freeze" the Output from the evaluation of an Input cell, so that subsequent reevaluation of the Input cell doesn't end by erasing the previous output? E.g., I evaluate a plotting routine that takes a long time to do all its calculations, and I want to be sure I keep the resulting graphic around until I'm ready to delete it. I appreciate there are simple ways to do this "manually": 1) Insert (by hand) a dummy text cell between the Input and Output cells. 2) Export the Output to somewhere else, with a file name that contains an execution-time-dependent string. 3) Other similar approaches requiring "operator intervention". But is there an execution (or output) option for Input cells (or for individual commands) that says, "Don't replace previous output, even if it's still there"?