## 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 CallBys - lists only program units that are called by , others but do not call anybody else. These are low-level routines.
- Root Calls - lists only program units that call others, but are not called themselves. These are either high level code (mains), or code that is called by hardware (interrupt handlers), or dead unused) code.

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