Help: Add missing cross-referencing for generator expressions

diff --git a/Help/prop_sf/VS_SETTINGS.rst b/Help/prop_sf/VS_SETTINGS.rst
index 0719406..50034fb 100644
--- a/Help/prop_sf/VS_SETTINGS.rst
+++ b/Help/prop_sf/VS_SETTINGS.rst
@@ -15,4 +15,4 @@
 will set ``Key`` to ``Value`` and ``Key2`` to ``Value2`` on the
 ``file.hlsl`` item as metadata.
 
-Generator expressions are supported.
+:manual:`Generator expressions <cmake-generator-expressions(7)>` are supported.
diff --git a/Help/prop_tgt/VS_SOLUTION_DEPLOY.rst b/Help/prop_tgt/VS_SOLUTION_DEPLOY.rst
index 7906d75..a664d0c 100644
--- a/Help/prop_tgt/VS_SOLUTION_DEPLOY.rst
+++ b/Help/prop_tgt/VS_SOLUTION_DEPLOY.rst
@@ -6,7 +6,7 @@
 
 If the target platform doesn't support deployment, this property won't have any effect.
 
-Generator expressions are supported.
+:manual:`Generator expressions <cmake-generator-expressions(7)>` are supported.
 
 Example 1
 ^^^^^^^^^
diff --git a/Help/prop_tgt/VS_SOURCE_SETTINGS_tool.rst b/Help/prop_tgt/VS_SOURCE_SETTINGS_tool.rst
index f706888..738a912 100644
--- a/Help/prop_tgt/VS_SOURCE_SETTINGS_tool.rst
+++ b/Help/prop_tgt/VS_SOURCE_SETTINGS_tool.rst
@@ -16,4 +16,4 @@
 will set ``Key`` to ``Value`` and ``Key2`` to ``Value2`` for all
 non-built files that use ``FXCompile``.
 
-Generator expressions are supported.
+:manual:`Generator expressions <cmake-generator-expressions(7)>` are supported.