Thanks for the feedback.
You're absolutely right. We're working right now on the tooltips and
also on a wider help.
The TextFormatter connector attempts to format two pieces of text
("text1" and "text2") according to a given format. The default format
is "%s : %s" which replaces %s by "text1" and "text2" and concatenates
both strings separating them by the ":" character.
Making a text bold won't work on all situations because some services
(twitter, for instance) won't interpret any HTML code that you
publish. Nevertheless you could make "text1" bold by inputing the
string "<strong>%s</strong>" into the "format" input of the
I hope this information clarifies how the TextFormatter works.