<list>
<item><p>hold down <key>Ctrl</key> and use your mouse scroll wheel to zoom.</p></item>
<item><p>select desired zoom percentage from the drop down menu above the window.</p>
<list>
<item><p>hold down <key>Ctrl</key> and use your mouse scroll wheel to zoom.</p></item>
<item><p>select desired zoom percentage from the drop down menu above the window.</p>