You can select systems and apply the tags manually.
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Select Menu → Systems → System Tree → Systems, then select the group that contains the required systems.
Select the systems, then click Actions → Tag → Apply Tag.
In the Apply Tag dialog box, select the tag group, select the tag to apply, then click OK.
Only those tags to which you have permission are listed in the Apply Tag dialog box.
Verify that the tags have been applied:
Select Menu → Systems → Tag Catalog, then select a tag or tag group from the list of tags.
Next to Systems with tag in the details pane, click the link for the number of systems tagged manually. The Systems with Tag Applied Manually page is displayed.
Verify that the systems are in the list.