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

Here is the function of individual buttons on the element toolbar:

• Contents - open the contents window with the tree structure of knowledge stored in your current collection
• Search - search for texts in your collection 
• Back (<) - move back to the most recently visited element (same as Alt+Left)
• Ahead (>) - revisit elements that have been viewed before with the button Back (<) (same as Alt+Right)
• History - view the list of recently visited elements
• Home - go to the root of the whole collection, i.e. the element that is the parent of the whole knowledge tree (same as pressing the Home key)
• Previous element - go to the previous element in the contents window
• Parent - go to the parent of the currently displayed element (same as Ctrl+Up)
• 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 (same as pressing the End key)
• Paste () - paste an article from the clipboard to SuperMemo (same as Ctrl+Alt+N)
• Extract topic () - extract the selected fragment of text for learning (same as Alt+X). See: incremental reading for the importance of extracting topics from articles
• Cloze item () - generate a cloze deletion item to convert a sentence into a question-and-answer item (same as Alt+Z). See: incremental reading for the explanation of the importance of cloze deletions
• E-mail - forward the element via e-mail
• Reference link () - go to the source element from which a given element has been extracted in the process of incremental reading. By clicking the Reference link button, you can go to the article from which a given extract was taken. This button is not active in independent elements. If you pause the mouse over this button, you shall see the current reference for the element. To reset the reference hyperlink, Ctrl+Shift+click on this button
• Instant transcription - turn on/off providing phonetic transcription of texts when the mouse moves over the element window
• Instant translation - turn on/off translating 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 to see the position of the displayed element in the contents window
• Find - search the texts in the current element for a specific string and highlight all its occurrences

Note that the element toolbar may not be visible if Tools : Options : Data access : Hide element toolbar is checked