diff --git a/World-reduction.md b/World-reduction.md
index ef246c8..9354ccb 100644
--- a/World-reduction.md
+++ b/World-reduction.md
@@ -27,3 +27,8 @@ To check how many plots are outside a radius: `/plot condense <world> info <radi
  - If you already have thousands of plots outside your desired radius, it can take quite a long time.
 
 To run the task use: `/plot condense <world> start <radius>`
+
+#### World trim (intensive)
+The world trim function will attempt to delete as many chunks which contain no plots. It will drastically reduce the size of the world on disk. It is an intensive task, so it is recommended to run it only every week or so.
+
+To run the task use: `/plot trim all <world>`
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