of course I tried to long press the screen or the - sign on bottom, since this is how I removed apps I didn't want on the main screen.
but I couldn't find any hint in the options.
Maybe it depends on the version of android. I think mine is 4.4.2 but I'm not sure. will check and post again.
Don't know any 3rd party launchers and I trust Samsung's android so far.
thanks anyhow.