diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 6044a19..71ee824 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -672,7 +672,7 @@
 		"description": ""
 	},
 	"webGLVendor_description": {
-		"message": "Value to be reported in the webGL function \"getParameter\" for the \"vendor\". Leave empty to use the original value.",
+		"message": "Value to be reported in the webGL function \"getParameter\" for the \"vendor\". Special values:\nLeave empty to use the original value\n\n{undefined}: returns undefined (#508)\n\n{false}: returns the boolean value false (#508)\n\n{empty}: returns an empty string (#508)\n\n{disabled}: returns null (#508)\n\n{random vendor}: returns a random vendor from the build in list (#493)\n\n{random renderer}: returns a random renderer from the build in list (#493)\n\n<xxx|yyy|zzz>: picks one of the given options xxx, yyy or zzz at random (arbitrary number of options) (#493)",
 		"description": ""
 	},
 	"webGLRenderer_title": {
@@ -680,7 +680,7 @@
 		"description": ""
 	},
 	"webGLRenderer_description": {
-		"message": "Value to be reported in the webGL function \"getParameter\" for the \"renderer\". Leave empty to use the original value.",
+		"message": "Value to be reported in the webGL function \"getParameter\" for the \"renderer\". Special values:\nLeave empty to use the original value\n\n{undefined}: returns undefined (#508)\n\n{false}: returns the boolean value false (#508)\n\n{empty}: returns an empty string (#508)\n\n{disabled}: returns null (#508)\n\n{random vendor}: returns a random vendor from the build in list (#493)\n\n{random renderer}: returns a random renderer from the build in list (#493)\n\n<xxx|yyy|zzz>: picks one of the given options xxx, yyy or zzz at random (arbitrary number of options) (#493)",
 		"description": ""
 	},
 	"webGLUnmaskedVendor_title": {
@@ -688,7 +688,7 @@
 		"description": ""
 	},
 	"webGLUnmaskedVendor_description": {
-		"message": "Value to be reported in the webGL function \"getParameter\" for the \"unmasked vendor\". Leave empty to use the original value.",
+		"message": "Value to be reported in the webGL function \"getParameter\" for the \"unmasked vendor\". Special values:\nLeave empty to use the original value\n\n{undefined}: returns undefined (#508)\n\n{false}: returns the boolean value false (#508)\n\n{empty}: returns an empty string (#508)\n\n{disabled}: returns null (#508)\n\n{random vendor}: returns a random vendor from the build in list (#493)\n\n{random renderer}: returns a random renderer from the build in list (#493)\n\n<xxx|yyy|zzz>: picks one of the given options xxx, yyy or zzz at random (arbitrary number of options) (#493)",
 		"description": ""
 	},
 	"webGLUnmaskedRenderer_title": {
@@ -696,7 +696,7 @@
 		"description": ""
 	},
 	"webGLUnmaskedRenderer_description": {
-		"message": "Value to be reported in the webGL function \"getParameter\" for the \"unmasked renderer\". Leave empty to use the original value.",
+		"message": "Value to be reported in the webGL function \"getParameter\" for the \"unmasked renderer\". Special values:\nLeave empty to use the original value\n\n{undefined}: returns undefined (#508)\n\n{false}: returns the boolean value false (#508)\n\n{empty}: returns an empty string (#508)\n\n{disabled}: returns null (#508)\n\n{random vendor}: returns a random vendor from the build in list (#493)\n\n{random renderer}: returns a random renderer from the build in list (#493)\n\n<xxx|yyy|zzz>: picks one of the given options xxx, yyy or zzz at random (arbitrary number of options) (#493)",
 		"description": ""
 	},
 	
diff --git a/releaseNotes.txt b/releaseNotes.txt
index 4c96d39..149f531 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -1,6 +1,6 @@
 Version 1.9:
 	changes:
-		- 
+		- update setting descriptions
 	
 	new features:
 		-