application/pdf; zat '%s'; test=test -n "$DISPLAY"
application/vnd.gnupg.wks; gpg-wks-client -v --read --send; needsterminal; description=WKS message
application/x-perl; pod2text --color '%s' | less; needsterminal
+image/gif; sxiv '%s'; test=test -n "$DISPLAY"
image/jpeg; sxiv '%s'; test=test -n "$DISPLAY"
image/jxl; sxiv '%s'; test=test -n "$DISPLAY"
image/png; sxiv '%s'; test=test -n "$DISPLAY"