Hey Leslye,
configurable default states for empty tag archive pages are not yet envisaged in Ikebana, yet technically it can be achieved by editing the “taxonomy-tagportfolio.php” theme file – adding a conditional statement after line 59 that outputs certain html and content if the preceding $wp_query object is empty (a test if it’s not empty is already present on line 57, so an “else”-clause is all that’s needed, really).
Sincerely,
Andrii / Satori Studio