Sometimes you want to protect individual tiddlers from accidental changes, either from yourself or guests to your TiddlyWiki file. Here's a couple simple approaches. Note that these do not provide hardened protection against a wilful attack.
Create a tiddler with the following contents and tag it as $:/tags/Stylesheet :
.tc-tagged-Locked button[title="Edit this tiddler"] {display: none;}
If your TW language isn't English, then you'll need to change the text in 'title="...."' to whatever the text is when you hover over the edit button.
Now any tiddler you tag as "Locked" will have the edit button hidden. To get it back you will need to open the stylesheet tiddler and change "none" to "inline".
$:/ and then paste the original title.Now you can view the contents of your original tiddler, but to edit them your will have to find the the tiddler with the $:/ prefix.