diff --git a/doc/notes/prio.md b/doc/notes/prio.md
index 24ea0bb..e16e5f3 100644
--- a/doc/notes/prio.md
+++ b/doc/notes/prio.md
@@ -1 +1,3 @@
 \#static allow client to ignore lower-prio objects in the renderloop, to compensate frame-drop/cpu/gpu-overload scenario’s
+
+Q: should `-` be used to indicate 'lowering' priority (css's `z-index` 0-??? range is a bit confusing in that sense)