The bookmark pane is expanded and collapsed by pressing the bookmark button.
The Bottom toolbar is used for adding annotations such as text markups, ink and signatures.
After pressing the signature button the signature pad will appear on which the signature can be drawn. After drawing the signature, the Done button should be pressed to add the drawn signature to the PDF. The Clear button should be pressed to redraw the signature. The Close button should be used to cancel signing.
NOTE: On saving the handwritten signatures are flattened, so that it cannot be modified (it is not preserved as ink annotation).
Ink should be confirmed by pressing the Done button.
NOTE: On saving the annotations are flattened, so that they cannot be modified (they are not preserved as ink annotations).