Drop down menu, with editable options

Thank you! you are an absolute hero! - can i ask though, if its not to much - can you add another 15 'tests' so where at the moment, it goes to 5, can it go to 20? - I wish i could do it myself, but im rather lost

also, ive tried to extend the lists, so that i can have more staff (currently it has 19) to do this i tried to change the lists in the Name Manager, so that it would cover everything down to cell 200, but it the spreadsheet then seemed to stop working?

Thank you so much!!

Lily