Qoppa PDF components are implementing KeyListener and listening to key events redirected by the application. They handle key events such as Page Up, Page Down, End, Home, Escape, Up, Down, Right and Left. Read more about keyboard shortcuts in the components user guide:
Using the keyboard to navigate

Using CTRL + V key on the main pane when the hand tool is active will call the method PDFNotesBean.paste() or PDFEditor.paste(). This will paste an image as an image rubber stamp annotation and text as a typewriter annotation on top of the page. Read more about this in the components user guide:
Pasting Clipboard Image
Pasting Clipboard Text