Use ScreenTips to display information about specific elements in your document in Microsoft Word 2013 -- for example, you can display more information about a word or phrase when the reader hovers the mouse over it or you can offer information about an image. A ScreenTip is a hyperlink that points to itself. When the reader clicks the link, it changes its color and the insertion cursor is positioned at the beginning of the word.
Launch Word 2013 and open the document you wish to edit. To open a document, click File and select Open from the menu; select a Word document and click Open.
Select the element you wish to edit -- you can select words, phrases, images and other objects. Switch to the Insert tab and click the Bookmark button in the Links group to display the Bookmark dialog.
Type a name for the new bookmark in the Bookmark Name field. Bookmark names can only start with a letter and cannot contain spaces; they can, however, contain numbers. Click the Add button.
Click the Hyperlink button in the Links group to display the Insert Hyperlink dialog. Alternatively, press Ctrl-K to display the dialog.
Click the ScreenTip button and then type the ScreenTip in the ScreenTip Text field. The selected words are displayed in the Text to Display field. Click OK to save the ScreenTip.
Click the Place in This Document to view the bookmarks. Select the bookmark you created earlier and then click the OK button.
If the ScreenTip doesn't appear when you mouse over the element, you need to enable an option that shows them. To do so, click File and select Options from the menu.
Select Display from the left pane and then check the Show Document Tooltips On Hover box to enable the option. Click OK to apply the changes and display the ScreenTips.