Change the name of the elements within a list

Hi,

I was wondering if there is a way i could change the name of the element inside a list.

E.g. My list contains 7 elements and when i create a line graph of all 7 elements, each curve has the name ‘List1 , List2, etc..’ which forbids me to differentiate which curve belongs to which element.

I tried using the AssignListElementNames but it keeps coming up with an error

any advise is appreicated thanks!