The Galaxy Ultra has the hardware to edit PDFs better than most laptops. Big screen, S Pen, plenty of RAM, Samsung Notes for handwritten annotations. The PDF editor app Samsung ships is fine for marking up — not for actually editing text.
For real edits, Chrome.
What Samsung ships
Samsung Notes does PDF annotation — drawing, highlighting, S Pen markup. Excellent for reviewing and signing with handwriting. Doesn't edit underlying text. The default Files app handles preview only.
For changing text in a PDF on a Galaxy, Flint in Chrome is the route. Tap text, type, save. Same flow as any other device.
S Pen workflows
S Pen makes signatures look like real handwriting — pressure-sensitive, varies in thickness as you'd expect. For annotation (review comments, highlights), the pen feels natural in a way fingers don't.
If you've got a Galaxy Tab S series or a Fold, the bigger screen plus S Pen genuinely competes with iPad Pro for PDF work.
DeX desktop mode
Plug a Galaxy into a monitor (or use wireless DeX) and you get a full desktop interface. Chrome runs as a real desktop browser, and Flint works the same. Mouse and keyboard for text edits, S Pen for signing — best of both. Useful for road warriors who want one device.
Sharing across Samsung apps
Samsung's share menu is busier than stock Android — Quick Share, Smart View, Link Sharing alongside Gmail and Drive. All of them can pass a PDF to Chrome. Once the file's in Flint and edited, share the download back to whichever Samsung app you started in.
FAQ
Should I use Samsung Notes or Flint?
Samsung Notes for handwritten annotation and S Pen markup — it's genuinely good. Flint for editing underlying text, merging, splitting, compressing, and converting. Different jobs; both have their place.
Does Flint work in DeX?
Yes. DeX runs Chrome as a desktop browser, so Flint behaves like its desktop self — drag and drop files, use keyboard shortcuts, multiple tabs.
Will my S Pen pressure show in signatures?
Yes. Flint reads pressure and tilt data through standard pointer events. Signatures vary in thickness naturally, which makes them look authentic.
Galaxy's hardware deserves a proper editor. Open Flint in Chrome, use the S Pen, get it done.