Summary

Reading

uses portrait format to read text arranged in two columns
uses landscape format for text not arranged in columns ( but would like to have a slightly longer display)
show current paragraph (e.g. abstract) and hide/shade rest of the text
OR: option to show temporarily which line is being read by the user (but it should be as minimalistic as possible)

method depends on how long the text to be highlighted is:
for short text part: would use finger or stylus to highlight text line by line
for long text part: marks first word of text to be highlighted and drags finger or stylus to last word to be highlighted
OR: touch input: drags finger across line to be highlighted -> drags finger downwards to highlight following lines
OR: touch input: draws a circle or a line above the text line which should be highlighted
OR: would use thumb to mark the first line and drag index finger to the last line which should be highlighted (similar to pinch gesture)

double clicks on highlight or spot within the display -> menu pops up -> chooses comment function
-> comment box appears below current paragraph (probably comment box and text are rearranged to have more space for the comment box)
sticky note should be movable, resizable and hideable (if not in use)
option to choose between stylus or keyboard
rotates display by 90° to have more space for adding annotations
if comments are not edited they should be minimized (a small icon could indicate that there is a comment)

highlights word -> clicks on word -> menu pops up -> click on search option
OR: clicks on search button -> types word
OR: draws a big square -> writes word within square [picture: participant6 (4)]
-> search process starts -> highlights search results on the paper
information on bottom of the device to inform user about search results on following/previous pages
-> (icon appears on the bottom left side if the word appears on a previous page and it appears on the right side when the word is found on the following pages)
halo technique to show nearby annotations
OR: symbol/icon (no HALO) in case there are offscreen results on the current page
would also like to see the number of search results of the current page
if there is more than one result on the same page -> device tells him that he views the n-Th search result at this page
functionality to search within page, paragraph or whole document
search results are arranged in a list on the display: each entry shows page number and title of the paragraph

clicks on button -> history appears -> shows annotations type + page number
list is sortable (by type of annotation, location in paper, ...)
when device is located on a paper -> shows all annotations
OR: uses display in landscape format (just one half of the device covers the page) to find annotations
-> while moving the display on the paper -> comment box is shown on the display's part which does not cover the text
-> shows only one comment completely at the same time (other comments are shown as an icon) - as default the comment which is closest to the middle of the device should be shown completely
OR: remaining annotations are shown at the right border of the device as a small list (the distance between two annotations depends on their location within the paper)
uses halo technique
search within annotations (search by color/type/...)

clicks on button to see table of content, index or glossary
menu is searchable
after selecting a chapter -> corresponding page number + arrow on the left or the right side appears to show if the user has to look for the chapter within the previous or the following pages

to see the next or the previous page (depends on direction of flipping)
to expand screen space (e.g. one side for annotation mode and one side for browser)
to change between working space and shortcuts (such as calculator, browser, weather forecast)
flips display to see halos of nearby annotations

to share information (but wouldn't like to share annotations)
to compare two graphics (data matching)
to compare annotations of two persons
there should be a "union function" to see both the annotations of person 1 and person 2
there should be an "intersection function" to see highlighting from person 1 and person 2 which appear at the same spot
to expand viewing space

instead of scrolling could use tilting
when the display is lifted or tilted -> pdf appears on screen (becomes a tablet)
to take pictures
map application:
when device is on surface -> 2D view of map
when it is lifted up -> 3D map appears (the more it is lifted up -> the more the 3D effect appears)
to see annotations on the whole page

would like to have free form annotations to draw circles around words or question marks
would like to make a copy of the underlying page -> lock it -> move the display around without the physical paper
function to copy and paste highlighting, underlining
function to search in Google
click on word to show meaning, translation, synonyms
small bookmarks as reminder of annotations on other pages (bookmarks are always visible)
set an anchor in a book page to a picture -> other users can see this anchor when using the same book
use for sketching
problem: how to highlight text over two columns?