This section is for your custom content. To edit this area and add your own text, click the 'Customize' button at the top right of your Tumblr page or Dashboard when logged in, then click the 'Theme' button at the top left of your page. You will either be presented with a text box filled with code, or a a variety of themes to chose from. If other custom themes are displayed, click 'Custom HTML' at the bottom of the window. Once there, scroll down until you find the section of code clearly labelled 'CUSTOM SIDEBAR SECTION'. You will then be able to highlight, delete, and replace the title and this block of text. Be sure not to remove any surrounding code.