You can use rectangles or circles to focus on a specific object on the picture or as a frame for linking in the picture or masking the picture . The functionality for the rectangle and the circle is the same except for the shape.
  • Hoover the mouse over the media.
  • Select the rectangle or circle from the bottom row.

Edit or add functionality to rectangle or circle

  • Click and drag the figure to move or resize
  • Switch between rectangle and circle shape by choosing the symbols to the left
  • Remove (or add) frame
  • Change color by the palette
  • Add link
  • Add tool tip text
  • Remove the figure

When you have added a rectangle or circle you can mask the field outside the figure.