Choose a different autocomplete option in Calc

I just would like to summarize suggestions from comments here.

When an auto-completion suggestion is shown inside a cell (after a character is typed, suggested text is selected):

Ctrl + Tab cycles through all auto-completion values for the cell, on every key press, selected suggested text is replaced with the next suggestion
Alt + Down shows a pop-up select box under the cell with all auto-completion suggestions sorted alphabetically

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