In WORD 2010, as in other OFFICE 2010 applications, the commands are organised in RIBBON. Each TAB is divided in groups. MAILINGS TAB contains groups: CREATE, START MAIL MERGE, WRITE & INSERT FIELDS, PREVIEW RESULTS, FINISH.
Image 1. MAILINGS TAB (The image is mapped )
Choosing TAB from RIBBON, steps:
RIBBON Parts of WORD window Index