You create a tiddler either by clicking the {{$:/core/images/new-button}} button in the sidebar, or by clicking on a link to a missing tiddler. Links to missing tiddlers are shown in [[blue italics]].
When you create a new tiddler or edit an existing one, the tiddler will go into draft mode. This presents a control panel for modifying the tiddler in various ways. It has several parts, from top to bottom:
*''The tag selector'' - Use this to add or remove tags. As you type a tag name in the box, a dropdown list will show you any existing tags that match. You can pick from this list or create a completely new tag. Then click the ''add'' button to add the tag to the tiddler. Each tag is shown as a coloured pill. Click the "×" on a pill to remove that tag
*''The text area'' - Use this to edit the main content of the tiddler. Click the ''preview'' button ({{$:/core/images/preview-closed}} / {{$:/core/images/preview-open}}) to see what your changes will look like
*''The type selector'' - Use this when a tiddler needs to be displayed in a special way, such as an image. See ContentType for a list of the options. The default is `text/vnd.tiddlywiki`, which means the tiddler contains WikiText
*''The field selector'' - Use this to add or remove fields on the tiddler. For example, if you are editing a tiddler that's being used to tag other tiddlers, you can add a [[''list'' field|ListField]] to change the order in which those tiddlers will be listed
*The ''ok'' button ({{$:/core/images/done-button}}) stores your changes to this one tiddler and leaves draft mode. If your wiki is configured to [[AutoSave]], your changes will be permanently saved. Otherwise they will only be stored temporarily in your web browser, and you will lose them if you close your ~TiddlyWiki page without first clicking the master ''save changes'' button ({{$:/core/images/save-button}}) in the sidebar.