The shape of the Activities button represents your workspaces, the grouping of windows on your desktop. For example, below is the shape of the Activities button if you have 3 workspaces and the second workspace is the one that it displayed right now.
<p>By default, any setting that you change in Tails is lost when you shut down. Only the settings that you saved in the [[Persistent Storage|persistent_storage]] are restored when you restart Tails.</p>
<p><b><i>Persistent Storage</i></b> allows you to save some of your files and configuration in an encrypted Persistent Storage on your Tails USB stick.</p>