diff --git a/src/finn/util/basic.py b/src/finn/util/basic.py
index 3880bb9591e27af5fe9d063dba2485d304e4db54..338ca4674fbd309c65300ab45b8bfc7010b82a29 100644
--- a/src/finn/util/basic.py
+++ b/src/finn/util/basic.py
@@ -56,6 +56,11 @@ def get_rtlsim_trace_depth():
     via the RTLSIM_TRACE_DEPTH environment variable. If the env.var. is
     undefined, the default value of 1 is returned. A trace depth of 1
     will only show top-level signals and yield smaller .vcd files.
+
+    The following depth values are of interest for whole-network stitched IP
+    rtlsim:
+    - level 1 shows top-level input/output streams
+    - level 2 shows per-layer input/output streams
     """
 
     try: