By default cacti graphs use Normal in GPRINT type. This is sometimes little bit annoying e.g. temperatures near zero are shown like 15 m instead of more human readable form 0.15 in legends etc..
Define new GPRINT preset Graph management -> GPRINT Presets -> Add -> Name: Dont scale to SI mag, GPRINT Text: %8.2lf and modify graph items to use newly defined GPRINT Type
Current uses ‘Dont scale to SI mag’ and Maximum uses ‘Normal’ GPRINT Type in Graph Management -> Graph Items
PS. Unit Exponent Value (–units-exponent) = 0 in graph definition prevents scaling graph’s y-axis values