You can prevent a tiddler from being saved in the file by creating a global macro named `publishFilter()` that removes the specific tiddler title, like this:
Create a tiddler (e.g., "MyPublishFilter"), tagged with `$:/tags/Macro`, containing:
```
\define publishFilter()
-[[$:/state/GMKey]]
\end
```
The contents of the `publishFilter()` macro are automatically appended to the `saveTiddlerFilter()` filter definition contained in `$:/core/save/all` which is then used by `$:/core/templates/tiddlywiki5.html` to determine which tiddlers will be saved to the TiddlyWiki file.
Notes:
* Each listed tiddler title should be preceded by a minus sign, so that those titles are excluded from the file.
* The `publishFilter()` macro can use any valid filter syntax. Thus, in addition to automatically excluding specific tiddler titles, you can exclude an entire set of matching titles. For example, if you were to specify `-[prefix[$:/state]]`, then ALL `$:/state` tiddler would be excluded from the file when it is saved.
* The `publishFilter()` definition doesn't remove the tiddlers from the ***currently loaded*** TiddlyWiki... it just prevents those tiddler from being saved to the file so they won't be there the next time you re-load.
enjoy,
-e