Does Writer have a revision function, showing corrections made to a text?

Word has a useful revision/correction function (found under Tools) which highlights corrections made to a text and shows what has been omitted in a separate column to the right.
Is there anything similar in LibreOffice?

Yes, Edit → Changes or View → Toolbars → Changes. Comments are also available: Insert → Comments. Also, Edit → Compare Document compares two versions of a document for differences. Recent versions of LO even do quite a good job of tracking changes made in MS Word. See the Writer Guide, available from http://www.libreoffice.org/get-help/documentation/ for more detail. This will highlight changes and deletions - I’m not sure how it might track omissions :wink: