I've tried selecting all fills and changing but it only opens up the properties box to change the properties of the fills, not the text.
With all the Fills selected. Double click on the Text tool icon
(in the tool box palette) and it should bring up "Dimension Text Settings".
Marc Corney, Architect
Red Canoe Architecture, P. A.
Mac OS 10.15.7 (Catalina)
Processor: 3.6 GHz 8-Core Intel Core i9
Memory: 48 GB 2667 MHz DDR4
Graphics: Radeon Pro 580X 8GB
ArchiCAD 25 (5010 USA Full)