The text only feature is available on some publications at the publishers request. If you see a box at the bottom of the page that says “Text”, this means that this article can be read in an easy, text-only mode (without images). Tap the text box. If there is only one article you will automatically get a text-only version of that article, however, should there be multiple articles you will be prompted to chose the article you wish to read.
To go back to the full publication page, simply tap on the device’s back button.