I am using the "Standard" UML Profile in order to have the <<Trace>> stereotype on realization. Is there anyway to add to the palette an entry, so that a realization with <<Trace>> is created, in order not to have to set the stereotype explicitely through properties view?
Sure, there is. You can create your own dedicated palette for exactly those kind of things. Move the mouse onto the palette's area and clickt the right mouse button. There is a context menu entry 'Customize'