I'm new to Mathematica and am unfamiliar with the notebook interface. I haven't been able to delete cells with error messages.
For example, when I try to ask Mathematica to compute something, it returns a message like
Solve::nsmet: This system cannot be solved with the methods available to Solve
when it fails. Once I see that, instead of proceeding to the next line, I would like to highlight that error message (along with the erroneous command) and delete it. But Mathematica won't let me do it.
How do I do this the right way?