When you turn Notifications off for showing, they're just in the "inbox" & won't show on the watchface when received. You can then just access them whenever you want from the menu OR you can create a button shortcut that activates when pressing down.
FYI the previous generation of Pebble OS did not have a message counter, but this generation will apparently add this to its complications.
FYI the previous generation of Pebble OS did not have a message counter, but this generation will apparently add this to its complications.