The “Defaults” panel has been superseded by “Project Settings” option which includes values for the project from not only from the old Defaults file but also contains additional settings from other 12d panels.
The “Defaults” menu will be removed from future versions of 12d Model Software as it has now been superseded.
Detailed information and notes are available via the 12d Model Reference Manual. This can be accessed via the help button on the panel or using F1 on your keyboard whilst in 12d Model Software.
