Excel drop down list arrow has disappeared.

I have created a drop down list in an Excel file. I set it up for a cell to
refer to to the list via Data - Validation, but when the cell is chosen, the
drop down arrow does not appear. It has worked for months but it has now
stopped. I tried to delete it and re-create it, but it still does not show
the drop down arrow and list. What do I do?

go to menu Data > Validation and check the option in-cell dropdown if it is unchecked.

Originally Posted by Tony Maly

I have created a drop down list in an Excel file. I set it up for a cell to
refer to to the list via Data - Validation, but when the cell is chosen, the
drop down arrow does not appear. It has worked for months but it has now
stopped. I tried to delete it and re-create it, but it still does not show
the drop down arrow and list. What do I do?