Open the SiteTitle tiddler. (The tiddler is in GettingStarted but can also be found using the search box or listed under the All or Timeline tabs on the right-hand menu.)
Type the TiddlyWiki name in the main text box (below the yellow box which says 'this shadow tiddler...')
Click on Done (grey menu at top right of tiddler). The name should now be displayed in the header at the top of the TiddlyWiki.
The TiddlyWiki's sub-title can be changed by opening and editing the SiteSubtitle tiddler.
Type the TiddlyWiki name in the main text box (below the yellow box which says 'this shadow tiddler...')
Click on Done (grey menu at top right of tiddler). The name should now be displayed in the header at the top of the TiddlyWiki.
The TiddlyWiki's sub-title can be changed by opening and editing the SiteSubtitle tiddler.