By the time of the facility's 20th birthday, in March 1983, its official name had been shortened to MONARO MALL (sans "Shopping"). Only one third of the original stores were still in business. Among these were David Jones, Ganter's Fabric Salon and the Coles New World supermarket. Newer tenants included Table Top tableware, Everything Australian, Pacific Photo and Monaro Books.
Graphic from https://trove.nla.gov.au / National Library of Australia

A large-scale expansion of MONARO MALL was done in the late 1980s. The complex was extended over three adjacent city blocks, with a new Grace Brothers department store, Target discount store and Supabarn supermarket added. Existing David Jones and Venture stores were also remodeled. The revitalized shopping hub -renamed CANBERRA CENTRE- was officially dedicated in November 1989.  
Graphic from https://trove.nla.gov.au / National Library of Australia