Not everything sorts well alphabetically
Values like "High, Medium, Low" or "Beginner, Intermediate, Advanced" lose their meaning when sorted alphabetically. Creating a custom list lets you sort by the actual logical order you intend instead.
Built-in lists are ready to use immediately
Common sequences such as days of the week or months of the year are already registered as built-in custom lists, so you can select them directly from the Custom Lists dialog without typing anything.
Frequently Asked Questions
Once I create a custom list, can I use it in other files too?
Yes. A custom list is stored at the application level, so it is available in any workbook you open on that same installation of Excel.
Are weekday or month orders already built in?
Yes β sequences such as "Mon, Tue, Wed..." or "Jan, Feb, Mar..." are already available as built-in lists, so you can select them right away without creating your own.