diff --git a/particle-viewer.md b/particle-viewer.md
index 06f210e..4d230fe 100644
--- a/particle-viewer.md
+++ b/particle-viewer.md
@@ -1,5 +1,6 @@
 The particle viewer can be accessed from the main editor menu (when within a mod, press _Tab_ to open the editor), then click on the text at the top. The menu entry is near the bottom.
 
+_Warning: Save your map before you enter the particle viewer!_ The particle viewer unloads the current map and you will lose changes if you don't save!
 
 ## Limitations
 
@@ -12,5 +13,5 @@ Some particles are attracted by the mouse cursor or Naija or interact with the e
 * ___F1___ - Load particle. Enter a particle name, press return to load it (e.g. _awesometrail_).
 * ___F5___ - Reload all partcicle definitions, including the active particle. Restart the active particle. Useful when you have just edited something in the particle definition and want to test the change.
 * ___F9___ - Toggle an eel that will follow the mouse, and a black box rotating in a circle?
-* ___Left click___ - Enable particle spawn (either one-off or continuously, depending on the emitter).
+* ___Left click___ - Enable particle spawn (either one-off or continuously, depending on the emitter). The particle emitter will stick to the (invisible) mouse cursor.
 * ___Right click___ - Disable particle spawn and kill all particles.