At the top of the element window
you will find the navigation toolbar:

Here is the meaning of individual buttons:
- Contents - open the contents
window with the tree structure of knowledge stored
in the current collection
- Search - open the list of words used in the
current collection
- Back (<) - move back to the most
recently visited element (same as Alt+B)
- Ahead (>) - revisit elements that have
been viewed before choosing Back (<)
- History - view the list of recently visited
elements
- Next - go to the next
element (interpretation of this button depends on setting Next button
options available from the Next button pull-down menu on the professional
level)
- Home - go to the master node of the whole
collection (i.e. the node that makes the root of the knowledge tree)
- Previous element - go to the previous
element in the contents window
- Parent - go to the parent of the currently
displayed element
- Next element - go to the next element in
the contents window
- End - go to the last element in the
knowledge tree in the contents window
- Reference link (not active in independent elements) - go to the
reference source element. In incremental reading,
operations that generate new extracts and items assign the link to the
reference source element of the newly generated element. This way, by
clicking this button, you can quickly locate an articles from which a given
extract was taken. Extracts from extracts keep a link to the original
article (instead of a link to the parent extract)
- Instant translation - turn on/off
translating texts when the mouse moves over the element window
- Instant transcription - turn on/off
providing phonetic transcription of texts when the mouse moves over the element window
- Synchronize - turn on/off selecting the
currently displayed element in the contents window. Set this button in the down-state if
you want to always be able the position of displayed elements in the contents window
- Print - print the currently displayed
element
Professional level
Note that navigation toolbar may not be visible if Tools : Options : Data
access : Hide navigation toolbar is checked