problem when filter appointments with tags

Hello Zimbra Users,

I usually apply Tags to my Appointments, in order "mark" them with some nice colours...

Now, when I click on a Tag, the Agenda view is filtered with only such appointments that were been tagged with this Tag.

But no way to restore a "no filter" view, and see again all appointmens together.... How can I remove this filter? Changing view (and then returning to Agenda) is not useful.

Thanks for any response