Under the 'format' icon reside extra options that are not necessarily part of formatting text, but can be very useful to users creating a new conversation.

Posting in multiple channels, choosing New Conversation or Announcement, and determine who can reply are more + (plus) /advanced options, than text formatting options. This should be selectable in another way, as well, perhaps with an own ("+") icon too.

From the basic editor they now can only be selected from formatting icon. Because in general users not easily tick the option icons, they overlook the extra powerful options that may come in handy.