, click and hold the left
mouse button to drag a frame around the area to copy. Once the mouse button
is released, a pop-up menu is displayed to select whether to copy texts or
images into the clipboard.</p>

<p>To <em>add annotations</em>, hold <b>CTRL</b>, click and hold the left mouse
button to drag a frame around the region to annotate. Once the mouse button
is released, a pop-up menu is displayed to select whether to add text or
highlight annotations. Left-click to <em>edit annotations</em>. Right-clic