On Windows it is possible to enlarge it:
In the Registry Editor (regedit.exe), go to:
HKEY_CURRENT_USER\Software\Graphisoft\ArchiCAD\ArchiCAD 8.1.0 INT R2\Font Description
Here double-click the 'Extra Small Dialog Font Size' value and change it to e.g. 14 or 15 from 12. It will do the trick.
Other fonts control various other font sizes of Dialogs and palettes of ArchiCAD.
Laszlo
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28