So I found this command called "SetUpEditor(", this I assume is for creating a list if it doesn't already exist. Say I wanted to store a map into a list but I don't want it getting overwritten by putting it in L1,2,3,4,5 or 6, but instead, write the x coordinates in LX and the Y in LY, and the type of map block in LT.
I'll have trialed and errored and probably figured this out by the time anyone sees this but I'll ask in case there are others looking for a similar solution.

Creating a custom list is as easy as using it or defining its length:

Code:

Code:

You can enlarge or shrink a list by either storing into the (length+1)th element, or by using the dim( command again. Finally, DelVar will remove a custom list.