All HTML elements share a list of common global attributes. Some of these can be edited using a dialog specific to the element, such as the Link dialog or the Image Manager, usually in the Advanced tab of the dialog.
A separate dialog is available to edit a subset of these global attributes on all elements, namely:
title, id, class, dir, lang, contenteditable, draggable, hidden, spellcheck, and the event attributes.
To edit an attribute, select the element (or in the case of a paragraph or div click somewhere in the element), then click on the Insert/Edit Attribtues button.
Edit the attributes as required, and click the Update button.