I have a column with text. The text is a list of different names.
Any one of six names can be input into the cell. Rather than
retyping the same name over I used to press a key or key
combination on the next empty cell to give me a drop down selection
of previous cell entries that I could choose from, but I've forgotten
it. Can you refresh my memory?

I'ts similar to pressing right button on a cell and selecting 'pick from
list'
but it's done on the keyboard.