From a3bda72c6779fee28a5b67c7ad96a6aebc4d7fcf Mon Sep 17 00:00:00 2001
From: Dmitri Naumov <github@naumov.de>
Date: Tue, 21 Jul 2020 21:12:16 +0200
Subject: [PATCH] [doc] Add curves to FunctionParameter expressions.

---
 .../prj/parameters/parameter/Function/t_expression.md      | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/ProjectFile/prj/parameters/parameter/Function/t_expression.md b/Documentation/ProjectFile/prj/parameters/parameter/Function/t_expression.md
index f9eaacbf26b..823536ab626 100644
--- a/Documentation/ProjectFile/prj/parameters/parameter/Function/t_expression.md
+++ b/Documentation/ProjectFile/prj/parameters/parameter/Function/t_expression.md
@@ -1 +1,6 @@
-Mathematical expression of the function (currently x,y,z, and t are supported variables). For non-scalar values, an expression should be given for each component.
+Mathematical expression of a function.
+For non-scalar values, an expression should be given for each component.
+
+Currently x,y,z, and t are supported variables, and curves from the `<curves>`
+section can be called using their names.  A curve is a single argument function
+and can be used in an expression like `curveA(sin(t))`.
-- 
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