Fluent Ink is a handwriting notebook built for the pen on Windows. Ink follows your pen with no delay at all, just like real paper. Annotate your PDFs, add keyboard text and images, and keep every notebook in a beautiful library. WRITE LIKE ON PAPER • Pressure-sensitive pen with 3 saved colors per tool and a full palette (color wheel, hex input). • Highlighter that automatically straightens nearly straight strokes. • Two-mode eraser: whole stroke or precision. Flip your pen — the eraser tip is detected automatically. • Automatic shapes: hold the tip at the end of a stroke and it becomes a perfect line, circle, square or triangle. • Movable, rotatable ruler for perfectly straight lines. • Lasso selection: move, copy, duplicate or delete ink, images and text. • Full undo / redo, even after switching pages. ANNOTATE YOUR PDFS Import a PDF: every page becomes a notebook page, crisp even when zoomed in. Annotate with every tool, then export the document back to PDF. TEXT AND IMAGES • Keyboard text zones: bold, italic, underline, bullet lists, alignment, 4 font styles, sizes from 8 to 72 pt. • Drag-and-drop images: move, resize, rotate and crop. YOUR LIBRARY, YOUR WAY • Folders, favorites, recents, trash and search. • Several notebooks open at once, in tabs. • 26 cover designs with a customizable signature. • 7 paper sizes (A3, A4, A5, A6, A7, US Letter, Square), portrait or landscape. • Ruled, grid, dotted or blank paper in 11 colors. SHARE AND BACK UP • High-quality PDF export: your strokes stay sharp at any size and your text stays real text. • Portable .fluentink file to share or archive a notebook. • Export your whole library as a single archive. • Automatic saving with a backup copy, and session restore on launch. REMARKABLY SMOOTH Instant writing, perfectly fluid scrolling and zooming, even in large notebooks: Fluent Ink is designed to never slow you down.