Make a choice in an "extensible" list

Hello MSP*,

It isn't possible to enter an other name than those already present in the list, while the purpose of the solution I'm looking for is to be able to select a name in the list, to enter a new name in the cell if it isn't already in the list and to get Excel adding it to the list in order to be selectable the next time I have to enter a name.

The cells included in the validation include only the existing names.

Regards

Aloha

P.S.: I'm so late to answer because I'm doing almost a dozen things at the same time.

Hello Carim

Thank you for the nearly instant response.
Yes, of course I looked at it, but I didn't manage to adapt it to my concrete situation.

Regards

Aloha