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>The <b><i>Files</i></b> browser allows you to browse and organize your files, create folders, and [[connect to SSH or SFTP servers|desktop#files]].</p>
To learn about all keyboard shortcuts in GNOME visit [GNOME Help: Useful keyboard shortcuts](https://help.gnome.org/users/gnome-help/stable/shell-keyboard-shortcuts.html.en)or use the *Settings* utility in Tails: