Text is probably the most important element on your PowerPoint slides! You may have heard the adage that a picture is worth a thousand words, but more often than not, that picture needs a caption to be understood better — and even when there are no captions, a narrative is required. And that narrative is text too. Text can be added almost everywhere within PowerPoint slides — from placeholders and text boxes to the Notes pane. Additionally, you can also add and edit text within any shapes as long as they are closed.
Learn how to insert and edit text within a shape in PowerPoint 2013 for Windows.

