diff --git a/help/resamplingRefParam b/help/resamplingRefParam
new file mode 100644
index 0000000..bc0d32b
--- /dev/null
+++ b/help/resamplingRefParam
@@ -0,0 +1,6 @@
+<h3>Reference Parameter</h3>
+ Original sampling of <i>Reference Parameter</i> is used to resample ( average/interpolate ) 
+ all AMDA parameters used in your expression before calculations.
+ Drag / drop  parameter you wish to use as reference from AMDA parameter tree onto <i>Reference Param.</i> field.
+<br/>
+
--
libgit2 0.21.2