Fairfax Media says it will maintain the high editorial standards at its flagship newspapers when they move from broadsheet to "compact-sized" formats in two weeks.
The publisher expects the redesign to result in a short-term lift in sales of The Sydney Morning Herald and The Age.
The publisher has released details of the switch of the Monday-to-Friday editions of the Herald and The Age from broadsheet newspapers to compacts on March 4.
The Saturday editions will remain unchanged, but Fairfax plans to switch them to compact formats within the year when it closes its printing plants at Chullora in Sydney and Tullamarine in Melbourne.
One change will be the shift of the sports section to the back of the Herald, with BusinessDay becoming a liftout. The size of the body type will be increased slightly to make the papers more readable.
The editorial director of Fairfax Metro Media, Garry Linnell, said surveys had shown that readers' chief concern was that the redesign of the newspapers did not change their editorial tone.
"The size might be changing physically but the journalism that we pursue and practise is not going to change one bit," he said.