To lemmatise manually, with a word list on screen,
pull it onto the line you want to join it to.
and drop it:
You will then see the totals change and the items become visible in the Lemmas column.
If there are a lot, you can double-click the Lemmas column to see the details:
Page url: http://www.lexically.net/wordsmith/step_by_step/?lemmatising.htm