> Yes you can. That's how I verified this works. Open up the tag to > multiple lines (just type newline in the tag).
I use the plan9 legacy version, that seems to ignore typed newlines. With the p9p it works and possible with the 9front version too. Actually I can echo 'Edit {… }'>/mnt/acme/{winid}/tag with newlines and use that. Edit { s/^/\[/g s/$/\]/g } Or you can use the 2-1 chord to apply and use the Edit command in-place. But you need a confident mouse hand to use that effectively.