diff --git a/docs/preferences.md b/docs/preferences.md
index e20084c5f..4e379909a 100644
--- a/docs/preferences.md
+++ b/docs/preferences.md
@@ -102,10 +102,10 @@ Commands (CLI, MCP, control channel):
   `EFFECTCRAFT_GPU_INFLIGHT` overrides it. CPU renders have no such setting: they keep one
   frame per thread in flight, so their memory grows with the core count. Set
   `EFFECTCRAFT_CPU_INFLIGHT` to a whole number of frames (at least 1) to cap the frames in
-  flight of every render, `effectcraft-cli render` included
-  ([#1615](https://github.com/storytold/effectcraft/issues/1615)). One exception: while a job
-  on GPU Acceleration times both compositors on its first frames, it renders them under the
-  cap but keeps them all (up to 12) until it has chosen.
+  flight of every Render Queue render and export, `effectcraft-cli render` included
+  ([#1615](https://github.com/storytold/effectcraft/issues/1615)); previews don't read it. One
+  exception: while a job on GPU Acceleration times both compositors on its first frames, it
+  renders them under the cap but keeps them all (up to 12) until it has chosen.
 - `threeD.defaultRenderer`: Default 3D Renderer
 - `labels.N.name` / `labels.N.color`: the 16 label names and colours, used by the Label menu,
   the timeline, project panel, render queue and viewer handles