diff --git a/editions/de-AT-server/tiddlywiki.info b/editions/de-AT-server/tiddlywiki.info
index 12c1091507..c09be1db87 100644
--- a/editions/de-AT-server/tiddlywiki.info
+++ b/editions/de-AT-server/tiddlywiki.info
@@ -3,7 +3,8 @@
 	"plugins": [
 		"tiddlywiki/tiddlyweb",
 		"tiddlywiki/filesystem",
-		"tiddlywiki/highlight"
+		"tiddlywiki/highlight",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/de-AT/tiddlywiki.info b/editions/de-AT/tiddlywiki.info
index 57d062d9ab..7dc9464160 100755
--- a/editions/de-AT/tiddlywiki.info
+++ b/editions/de-AT/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"en-GB",
@@ -30,4 +31,4 @@
 			"--rendertiddlers","[!is[system]]","$:/core/templates/static.tiddler.html","static","text/plain",
 			"--rendertiddler","$:/core/templates/static.template.css","static/static.css","text/plain"]
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/de-DE/tiddlywiki.info b/editions/de-DE/tiddlywiki.info
index 6138d40bb7..0cabd3f282 100755
--- a/editions/de-DE/tiddlywiki.info
+++ b/editions/de-DE/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"en-GB",
@@ -33,4 +34,4 @@
 			"--rendertiddlers","[!is[system]]","$:/core/templates/static.tiddler.html","static","text/plain",
 			"--rendertiddler","$:/core/templates/static.template.css","static/static.css","text/plain"]
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/dev/tiddlywiki.info b/editions/dev/tiddlywiki.info
index 0a695359fa..9ccbb65b0c 100644
--- a/editions/dev/tiddlywiki.info
+++ b/editions/dev/tiddlywiki.info
@@ -3,7 +3,8 @@
 	"plugins": [
 		"tiddlywiki/highlight",
 		"tiddlywiki/nodewebkitsaver",
-		"tiddlywiki/github-fork-ribbon"
+		"tiddlywiki/github-fork-ribbon",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/es-ES-server/tiddlywiki.info b/editions/es-ES-server/tiddlywiki.info
index 93ba8ff125..c53b18a292 100644
--- a/editions/es-ES-server/tiddlywiki.info
+++ b/editions/es-ES-server/tiddlywiki.info
@@ -3,7 +3,8 @@
 	"plugins": [
 		"tiddlywiki/tiddlyweb",
 		"tiddlywiki/filesystem",
-		"tiddlywiki/highlight"
+		"tiddlywiki/highlight",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/es-ES/tiddlywiki.info b/editions/es-ES/tiddlywiki.info
index 29aa2d4e43..b72f0b5ee2 100644
--- a/editions/es-ES/tiddlywiki.info
+++ b/editions/es-ES/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"es-ES"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/fr-FR-server/tiddlywiki.info b/editions/fr-FR-server/tiddlywiki.info
index b7460b53f9..4129b88547 100644
--- a/editions/fr-FR-server/tiddlywiki.info
+++ b/editions/fr-FR-server/tiddlywiki.info
@@ -3,7 +3,8 @@
 	"plugins": [
 		"tiddlywiki/tiddlyweb",
 		"tiddlywiki/filesystem",
-		"tiddlywiki/highlight"
+		"tiddlywiki/highlight",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/fr-FR/tiddlywiki.info b/editions/fr-FR/tiddlywiki.info
index f4b37b40d2..a710d57753 100644
--- a/editions/fr-FR/tiddlywiki.info
+++ b/editions/fr-FR/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"fr-FR"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/ja-JP/tiddlywiki.info b/editions/ja-JP/tiddlywiki.info
index 2fe01f6fdf..b6732ac05d 100644
--- a/editions/ja-JP/tiddlywiki.info
+++ b/editions/ja-JP/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"ja-JP"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/ko-KR-server/tiddlywiki.info b/editions/ko-KR-server/tiddlywiki.info
index 04e6a2f319..a7d97848e0 100644
--- a/editions/ko-KR-server/tiddlywiki.info
+++ b/editions/ko-KR-server/tiddlywiki.info
@@ -3,7 +3,8 @@
 	"plugins": [
 		"tiddlywiki/tiddlyweb",
 		"tiddlywiki/filesystem",
-		"tiddlywiki/highlight"
+		"tiddlywiki/highlight",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/ko-KR/tiddlywiki.info b/editions/ko-KR/tiddlywiki.info
index 95753c1643..5caf6a0855 100644
--- a/editions/ko-KR/tiddlywiki.info
+++ b/editions/ko-KR/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"ko-KR"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/tw5.com-docs/tiddlywiki.info b/editions/tw5.com-docs/tiddlywiki.info
index 1a80ab6a4b..bf8f1cac6d 100644
--- a/editions/tw5.com-docs/tiddlywiki.info
+++ b/editions/tw5.com-docs/tiddlywiki.info
@@ -1,7 +1,8 @@
 {
 	"description": "Documentation from tw5.com edition",
 	"plugins": [
-		"tiddlywiki/tw5.com-docs"
+		"tiddlywiki/tw5.com-docs",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/tw5.com-server/tiddlywiki.info b/editions/tw5.com-server/tiddlywiki.info
index 0c97506fe2..7f0ebb2157 100644
--- a/editions/tw5.com-server/tiddlywiki.info
+++ b/editions/tw5.com-server/tiddlywiki.info
@@ -4,7 +4,8 @@
 		"tiddlywiki/tiddlyweb",
 		"tiddlywiki/filesystem",
 		"tiddlywiki/highlight",
-		"tiddlywiki/mobiledragdrop"
+		"tiddlywiki/mobiledragdrop",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
diff --git a/editions/tw5.com/tiddlers/howtos/Text preview.tid b/editions/tw5.com/tiddlers/howtos/Text preview.tid
index beade8e641..378157cec2 100644
--- a/editions/tw5.com/tiddlers/howtos/Text preview.tid	
+++ b/editions/tw5.com/tiddlers/howtos/Text preview.tid	
@@ -3,4 +3,12 @@ modified: 20160817104802841
 tags: [[Editor toolbar]]
 title: Text preview
 
-Pressing the eye icon {{$:/core/ui/EditorToolbar/preview}} will open or close a preview window (and the eye) of the text you are editing.
\ No newline at end of file
+Pressing the eye icon {{$:/core/ui/EditorToolbar/preview}} will open or close a preview window for your WikiText (The icon-eye will also open or close).
+
+Right to the eye there is another icon, {{$:/core/images/chevron-down}}, which when clicked, shows you a dropdown which gives you access to six different types of preview:
+
+* //output// shows you the text as you see it when you do not edit the tiddler.
+* //html// shows you the [[source code|https://www.w3schools.com/html/html_intro.asp]] of that output. Your web browser uses this source code to display webpages.
+* //parsetree// and //widgettree// show you the two object trees that ~TiddlyWiki internally generates from ~WikiText. The //parsetree// collects basic information about your ~WikiText. From the informations of the parsetree the //widgettree// then generates extended informations and finally the above html (and the widgettree also does other things).
+* //differences from current// shows you the differences since the tiddler was last saved. Deleted parts are <span style="color:red;">red</span>, added parts are <span style="color:green;">green</span>.
+* //differences from shadow (if any)// does the same, but this time it shows you the differences to the underlying [[shadow-tiddler|ShadowTiddlers]].
diff --git a/editions/tw5.com/tiddlywiki.info b/editions/tw5.com/tiddlywiki.info
index ecd1fa636b..77a70d71f0 100644
--- a/editions/tw5.com/tiddlywiki.info
+++ b/editions/tw5.com/tiddlywiki.info
@@ -5,6 +5,7 @@
 		"tiddlywiki/browser-sniff",
 		"tiddlywiki/railroad",
 		"tiddlywiki/evernote",
+		"tiddlywiki/internals"
 		"tiddlywiki/menubar"
 	],
 	"themes": [
diff --git a/editions/tw5tank/tiddlywiki.info b/editions/tw5tank/tiddlywiki.info
index e1c730f2ac..bcb41dc6e7 100644
--- a/editions/tw5tank/tiddlywiki.info
+++ b/editions/tw5tank/tiddlywiki.info
@@ -1,7 +1,8 @@
 {
 	"description": "Demo of Tank integration",
 	"plugins": [
-		"tiddlywiki/tiddlyweb"
+		"tiddlywiki/tiddlyweb",
+		"tiddlywiki/internals"
 	],
 	"themes": [
 		"tiddlywiki/vanilla",
@@ -11,4 +12,4 @@
 		"index": [
 			"--rendertiddler","$:/core/save/all","tw5tank.html","text/plain"]
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/zh-Hans/tiddlywiki.info b/editions/zh-Hans/tiddlywiki.info
index 9b05c9e26d..1f4ca4cdd0 100644
--- a/editions/zh-Hans/tiddlywiki.info
+++ b/editions/zh-Hans/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"zh-Hans"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}
diff --git a/editions/zh-Hant/tiddlywiki.info b/editions/zh-Hant/tiddlywiki.info
index 37ff75d227..3b80bc0847 100644
--- a/editions/zh-Hant/tiddlywiki.info
+++ b/editions/zh-Hant/tiddlywiki.info
@@ -9,7 +9,8 @@
 		"tiddlywiki/seamless",
 		"tiddlywiki/centralised",
 		"tiddlywiki/tight",
-		"tiddlywiki/readonly"
+		"tiddlywiki/readonly",
+		"tiddlywiki/internals"
 	],
 	"languages": [
 		"zh-Hant"
@@ -40,4 +41,4 @@
 	"config": {
 		"retain-original-tiddler-path": true
 	}
-}
\ No newline at end of file
+}