Activating Annotate mode causes the annotation toolbar to appear
in the preview area. From here you have access to both static and
dynamic annotations. The four icons on the left of the toolbar allow
you to select an the type of objects to insert onto a page. To show
the drop down menu, click and hold the icon. A standard short click on
an icon will activate it. You can then click or drag on a page to
create the corresponding object. The next three icons allow control
over stroke and fill color and line width of selected annotations. The
right-most icon in the toolbar opens the Annotation inspector
which shows a list of all dynamic (i.e. true PDF) annotations in the
document. The Annotation Inspector
allows you to add and edit
notes on any annotation.
See the section Annotate Pages for more information.