You find different defaults under File > Options > Project.
* Defining Alignment Grid: See Alignment of Objects in this chapter.
* Precision: Here you can define the default number of decimal places for numeric values, which will be used as long as they aren't printed with format specifiers (ex. FStr$).
* Table of Contents and Index: Here you can set the maximum folder depth for table of contents and index. See Report Sections in chapter Page Layout.