Hello,
first of all sorry for my bad englisch. I`m dutch. I`m creating a timetable for my colleague at work. Now I wanted to give some cells a list. In this example for the numbers 1 till 10. But wenn a number is used it has to disappair from the list. What I really want is that it is even impossible to enter. What I want are 2 validation options but I looks to me I only can set one option at the time. I included a example I made. Here my option list decreases every time I use a number but I still can use a number I allready used. If I`m not clear enough let me know.
Example.xlsx
Greetz Patrick
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