The default box where you add tags naturally does not use tag groups. Therefore, the plugin offers a “Meta Box” that helps you edit post tags separated by groups. The Meta Box is by default off. You need to activate and configure it in the settings.
The meta box can be adjusted like the other boxes on the post edit screen:1 You can move it around (below the text box and into the sidebar), fold it and hide it by deselecting it in the “Screen Options” on the very top. If you use the plugin’s meta box, it makes sense to disable the default tag box in the settings.
The Meta Box handles only tags that are assigned to one of the groups.
In the Meta Box you can open only particular tag groups, or open all by clicking on the arrow-down icon on the right side of the box. The arrow-up icon closes all groups again.
Once a group is open, the tag input field is already populated with tags that belong to that group. Click into the field and click on one of the tags that appear in the menu, or start typing to see all tags of this group that match the characters.
When you type a tag, you can finish it by pressing Enter or by typing a comma or semicolon.
On the right of the tag group name you find two buttons: The left one adds all tags of this group, the right one closes this group in the editor.
Depending on the settings, you may also add new tags or add a tag that is currently in another group, in order to move it to this group. Added and moved tags will be marked green and yellow. If the settings allow you to move tags, you can also move them by drag and drop.2
Nothing is final until you save that post. Until then, no new tags will be created, no tags moved to other groups and no post tags changed.
Only when you save the post, it will receive the new tags and keep the old tags that it had before and that were hidden in groups that you kept close.
Please note that other plugins and usual templates usually don’t use tag groups. For them, all tags form just one unsorted group. If you want to display them in groups to your visitors, you need to use the Gutenberg blocks or shortcodes of this plugin or modify your theme. You can also display post tags under the posts sorted by groups.
Note 1: Since tags are separated in the input field by comma (“,”) or semicolon (“;”), tag names cannot contain these characters in order to work with the meta box.
Note 2: The meta box works only correctly if tag names are unique. It is not sufficient if tags with identical names are differentiated by their “slugs” (piece of the link).
Note 3: If you display both the default tag box and the meta box, you should avoid any contradictory or double actions, like adding the same tag to both boxes or renaming a tag in one box and removing the same tag in the second tag box.