To control the size and position of labels, click View tab > View Options panel > Geometry & Form > Interactive Labels.

To:
- move a label, left-click and hold the label box, drag the label to its new position, then release the mouse button.
- rotate a label through 90 degrees, right-click the label and select Rotate label clockwise or Rotate label counter-clockwise from the context menu.
- hide a label, right-click the label and select Label visible from the context menu.
- size the labels, right-click a label and select Label settings from the context menu.