how do I select multi values from a list

[Guest]

I would like to select from a list after I create the list for validation for
a cell.
Example:
List has L1, L2, L3, L4, L5 as each individual item to choose from.
I would like to be able to choose L3 and L5.
Normally I only able to choose L3 or L5.
Please help if you could.
Thanks
Tom

 

[Guest]

How can the values you selected be dispalyed? in the same cell?

“Tommyâ€ç¼–写：