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I am a newcomer to Sage. The PREP Tutorials(http://doc.sagemath.org/html/en/prep/Intro-Tutorial.html#help-inside-sage) introduce two applications of “tab completion”:

1. If you aren’t one hundred percent sure of the name of a command.
2. Use this to see what you can do to an expression or mathematical object.

I tried some examples of the first type in SageMathCell and succeeded. But, in SageMathCell, when I tried some second type examples the tutorials provide, I didn't see a list pop up. Is there something wrong? I would appreciate any help with this situation.

I am a newcomer to Sage. The PREP Tutorials(http://doc.sagemath.org/html/en/prep/Intro-Tutorial.html#help-inside-sage) introduce two applications of “tab completion”:

1. If you aren’t one hundred percent sure of the name of a command.
2. Use this to see what you can do to an expression or mathematical object.

I tried some examples of the first type in SageMathCell and succeeded. But, in SageMathCell, when I tried some second type examples that the tutorials provide, I didn't see a list pop up. Is there something wrong? I would appreciate any help with this situation.