You can manipulate your list, for example take intersection or difference, in the ‘View’ section under the ‘Lists’ tab.

You can manipulate your lists, to intersect, to subtract and so on.
The actions could be found above your lists.
Suppose you want to find the common genes within 2 lists. You can
- Check the checkbox of the interested lists.
- Click the ‘Intersect’ .
- Enter a name for the new list in the pop-up box.
- Get a new list which contains the common genes.