## Root Filters

Note the tabs above beginning with “Root”, as in Root Decls or Root Withs. “Root” tabs filter entities to only what is on the top of a given tree. The tops (or bottoms) of relationship trees are often helpful points to being exploration of code new or unknown to you.

- Root Decls - list only the highest level declaring routines.
- Root Withs - list only program units (packages, tasks, subprograms) that With other program units, but are not withed by anybody else.
- Root Calls - lists only program units that call others, but are not called themselves. These are either high-level code (mains), code that is called by hardware (interrupt handlers), or dead (unused) code.
- Root CallBys - lists only program units that are called by others, but that do not call anybody else. These are low-level routines.

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