Here at Stackexchange there are some questions related to vertical space in lists. For example: \topsep, \itemsep, \partopsep and \parsep - what does each of them mean (and what about the bottom)? How to remove the whitespace BEFORE itemize/enumerate?
My question just goes a little bit further:
I'd like to modify the whitespace BEFORE the list WITHOUT modifying the space AFTER the list. If i just change the parameter \topsep, both whitespaces will change. Ideally i want to change the parameters globally.
The only solution i found, is to include a negative vertical space before each list.