Moving labels

You can move a label for a model element independently of moving the
element itself. (I.e. if you move the element, the label keeps the same
relative position; but if you move the label, then only the label moves -
the element doesn't.)

There is no constraint on where you move the label to, so it is possible
for the label to be visually far removed from the element that it is
labelling. You can also move the label to be inside the element: e.g. a
compartment label inside the compartment, or a submodel label inside the
submodel rather than (by default) just outside it.

To move a label relative to its element, the element itself must not be
selected. If the element is selected, then dragging the mouse across the
label will select the text of the label, allowing you to edit the label.
To move the label instead, click in a blank area of the diagram to ensure
that nothing is selected, and then drag the label to its new position.

In: Contents >> Working with model diagrams >> Moving model diagram
elements