The ''action-setfield'' widget is an [[action widget|ActionWidgets]] that assigns values to the fields of a tiddler. ActionWidgets are used within triggering widgets such as the ButtonWidget.
|$value |The value to be assigned to the field or index identified by the $field or $index attribute. If neither is specified then the value is assigned to the text field. If no value is specified, $field or $index will be deleted.|
|$timestamp |Specifies whether the timestamp(s) of the target tiddler will be updated (''modified'' and ''modifier'', plus ''created'' and ''creator'' for newly created tiddlers). Can be "yes" (the default) or "no" |
|//{any attributes not starting with $}// |Each attribute name specifies a field to be modified with the attribute value providing the value to assign to the field |
Here is an example of a pair of buttons that open the control panel directly to specified tabs. They work by using ''action-setfield'' to set the state tiddler for the control panel tabs.
Here is an example of a button that assigns tags and fields to the tiddler HelloThere, and then navigates to it and opens the tiddler info panel on the "Fields" tab:
<$macrocall $name='wikitext-example-without-html'
src='<$button>
<$action-setfield $tiddler="HelloThere" tags="NewTag [[Another New Tag]]" color="red"/>