diff --git a/docs/make.jl b/docs/make.jl
index dad36527..f656e346 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -13,7 +13,7 @@ License = "License" => "license.md"
 
 Index = "Index" => "longlist.md"
 
-pages = [Introduction, Getting_Started, License, Index]
+pages = [Introduction, Getting_Started, Input_Data, License, Index]
 
 makedocs(;
     modules=[GRASS],
diff --git a/docs/src/input_data/description.md b/docs/src/input_data/description.md
index 7949d413..93997247 100644
--- a/docs/src/input_data/description.md
+++ b/docs/src/input_data/description.md
@@ -1,2 +1,3 @@
 # Input Data Description
 
+GRASS empirically synthesizes time-variable line profiles using observations of solar lines. These processed solar observations are referred to as "input data."