Issue: Pen Tool Positioning on PDFs

There seems to be a problem with the pen tool when annotating PDFs.

When drawing with the pen on a PDF, the actual drawing is not displayed directly at the cursor position, but instead appears a few centimeters above it. This makes precise annotations very difficult and frustrating.

Additionally, when changing the PDF view size, for example switching between a smaller and larger PDF window or resizing the view, the annotations no longer stay correctly attached to the PDF itself. The pen strokes shift and appear in different positions than where they were originally drawn.

The annotations should remain locked and accurately mapped to the PDF coordinates regardless of zoom level or window resizing.