Information Technology Reference
In-Depth Information
information that indicates which portion of the annotation is visible at what area of
this page.
Adapting the print layout implicates the drawback that the user has to make a
decision before printing the document. Therefore, in addition to adapting the layout
of single pages before printing them, users can dynamically modify the layout of
several printed pages. If the space available on a document page (and on the optional
notetaking area) is not sufficient for making annotations, users can dynamically add
one or more empty paper sheets to this document page by associating them with a
line gesture (see Section 6.2 below). This corresponds to the GUI interactions of
enlarging a window to have more space available or to scrolling in a document view
to display an empty area.
5.2 Paper-based Sharing of Annotations
As discussed in the previous chapters, collaboration is an important element of
document-based knowledge work. While paper documents are well-suited for many
types of co-located collaboration, they constrain remote collaboration in compari-
son to digital documents. This section focuses on remote sharing of annotations and
discusses means that allow the user to share annotations directly when writing them
on paper.
Scenario 8 (Private and Public Annotations)
It is absolutely acceptable for Sally
to share her annotations of the lecture script with the other members of her learning
group. However, from time to time she makes off-topic notes, which she prefers to
remain personal. For example, she makes an appointment with a fellow student and
notes his phone number. Moreover, she takes a note reminding her what she wants
to buy after the lecture. She marks these notes as private. They are not shared with
other persons.
An interaction technique for sharing notes should be seamlessly integrated with
annotating and be quick and reliable. Related research [74, 75] discusses several
means for classifying annotations:
One method is spatial differentiation. This consists of reserving different areas on
the printout for annotations of different visibility. The annotation has automatically
the visibility of the area it is written in. For instance, all annotations written in
the “share” area are automatically shared with collaborators. Spatial differentiation
is intuitive and provides clear visual feedback on which annotations are shared.
However, it is not possible to make an annotation directly within its context of the
printed document, e.g. highlighting a specific word. Moreover only a very small
number of sharing levels can be supported because each additional level requires an
additional empty area which occupies valuable space on the printed document.
A second method consists of using different pens for different visibilities. Each
pen is associated with one visibility. While for instance all annotations written with
the green pen are automatically shared, annotations written with the red pen remain
