You can insert a hyperlink in the current position for back to the top of the article conveniently.

 

When editing an article, locate the cursor to the position in which a hyperlink need to be inserted, and click "Main Menu->Insert->Insert [back to top] Hyperlink" successively.  A dialog for inserting a hyperlink will be displayed. 

 

 

In the dialog box, edit the hyperlink text and click "OK" and then a hyperlink will be inserted.  When reviewing the article, click the hyperlink to go back to the top of the article.