📄 Office: PDF, spreadsheets, text

Open and edit PDFs, Excel spreadsheets and Word documents right in the program.

What it does for you

• Fill in and sign a form without opening another program.
• Edit spreadsheets and texts, save – done, the file is back in your storage.
• Everything runs on your device; no document goes to a third-party service.

Who it is for: Everyone who keeps PDFs, spreadsheets or text documents in their storage.
What you need: Nothing – the editors are built into the program. View-only on the phone.

The insurance company sends a PDF form that you're supposed to fill in, sign and send back. You open it with a double-click in DasDing, fill in the fields, put your signature on the page, click 💾 Save – and the finished file is in your storage.

How it works

Open documents in the personal area with a double-click in a separate editor window. The program loads the file onto your device, you edit it there, and 💾 Save writes it back. The old version stays until the new one has fully arrived – if something breaks off, nothing is lost.

The editor always shows where the file lives, and after saving the time. The 🕘 Recent documents button in the personal area finds your latest documents again.

What works

• PDF – write and draw: with T, click anywhere on the page and type (font, size, colour, bold). Plus pen ✎, rectangle, ellipse, line, arrow, highlight 🖍 and white-out ⬜ (a white area – that's how you replace existing text: cover it, then write anew). Place images 🖼 and a drawn signature ✍ with a click. Move everything with ➤, resize at the corner, Del deletes, ↶ (Ctrl+Z) undoes.
• PDF – pages: rotate, delete, insert a blank page, duplicate, move up/down, insert another PDF (merge) and an image as a new page (e.g. a scan). Fill in and flatten form fields.
• Spreadsheets (.xlsx, .xls, .ods, .csv): edit cells and formulas, several sheets; saved in the same format (CSV: the first sheet). Merged cells, column widths, row heights and number formats (date, CHF, percent) are kept.
• Text (.docx, .txt): write with headings, bold, italic, underline, lists, quotes, dividers and links, plus tables (▦ insert, add or remove rows/columns, header row, merge cells) and images (🖼). Drag a column width at the column line and an image size at the bottom-right corner – both are kept when saving and with “As PDF”, as are image sizes and column widths from Word. Font: choose font and font size (or make text larger and smaller with A+/A−), text colour (A) and highlight (ab), align paragraphs left, centred, right or justified – all of it is kept when saving as .docx and with “As PDF”. .txt saves plain text only.
• OpenDocument (.odt) and RTF (.rtf): are opened and edited and stored next to the original with 💾 Save as .docx ….
• 📄 As PDF: save text documents and spreadsheets as a PDF in the same folder – tables with merged cells and with bold, colour and alignment inside the cells.
• Create new: ＋ New PDF, ＋ New spreadsheet, ＋ New text document – right in the correct folder. A new PDF is a blank page you write on with T; for longer texts better create a text document and save it 📄 As PDF.
• Save as a copy: creates a new file next to the original.

🎨 DasDing Graphics – editing images

Crop a photo, brighten it, add text or remove the background – right in DasDing, without extra software.

• Open: view an image in your personal area (double-click) → 🎨 Edit. A blank canvas comes with ＋ New graphic. On the phone: tap an image → 🎨 Bearbeiten, new via ＋ Dokument → 🎨 Grafik.
• Crop: freely or in fixed formats (square, landscape/portrait, 4:3, 21:9), rotate and flip.
• Adjust: brightness, contrast, colour/saturation, warmth, blur, plus threshold, posterize, pixelate and noise.
• Filters: ready-made looks with one click.
• Draw & text: text in font, size and colour, rectangles, ellipses, polygons, lines, arrows, pen and inserted images.
• Watermark: put text or an image over the photo.
• Size: change width and height in pixels.
• 📸 Screenshot (PC): in your personal area 📸 Screenshot – on Windows the screen appears frozen: click a window (it gets a bright frame), drag an area or 🖥 Whole screen – with several screens the selection appears on each, and 🖥🖥 All screens takes them all together; Esc cancels. On Linux the desktop shows its own selection. The picture opens right here for editing; then 📋 To clipboard (e.g. paste into an e-mail), 💾 Save in DasDing (folder “Screenshots”) or 💻 On this computer ….
• ✂ Remove background: cuts out people and objects; the background becomes transparent. The first time, DasDing downloads about 60–80 MB once from our server (verified); after that everything is computed on your device and the image never leaves it. On the PC it takes a few seconds, on the phone longer. JPG has no transparency – then DasDing saves a PNG file next to it.
• Save: 💾 in the same format (JPG and WebP with selectable quality), Save as copy … or As … PNG, JPG or WebP. GIF and BMP are saved as PNG. Photo data such as location and camera is removed when saving – handy before you share a photo.

Editing on the phone

In the Files tab tap a document → ✎ Edit. Create new documents with ＋ Document (text document, spreadsheet or PDF).

• Text documents and PDFs are edited as on the PC – with the same tools.
• Spreadsheets: tap a cell, enter a value or formula at the top (e.g. =SUM(B2:B9)) and ✓. German function names and “;” work too; DasDing stores them the way Excel expects.
• 💾 Save stores the file safely in your personal area, as on the PC. If someone changed it on another device in the meantime, DasDing asks (overwrite or save as a copy).
• Unsaved changes: closing with ✕ asks first.

What doesn't work (yet)

• The editor doesn't open old Word files (.doc, Word 97–2003) – save them as .docx in Word or LibreOffice.
• Images in text documents: PNG, JPG, GIF or WebP up to 10 MB (GIF/WebP become PNG on save); text boxes, headers/footers and footnotes from Word are lost on save.
• Elaborate formatting and templates from Word and Excel may be lost on save, in spreadsheets also font colours, fill colours and borders. Texts, numbers, formulas and number formats remain.
• The PDF signature is a visible signature, not a cryptographic one.
• Rewriting existing text in a PDF directly isn't possible – cover it ⬜ and write anew T.
• PDFs only have the standard fonts Helvetica, Times and Courier; characters outside Western Europe (e.g. emojis) become “?”.
• The editor doesn't open files over 100 MB.
• On the phone the spreadsheet doesn't recalculate formulas itself – that happens the next time it's opened on the PC or in Excel/LibreOffice.

Frequent questions

Is my document sent anywhere?

No. The editors run entirely in the program on your device. Nothing goes to an online service.

What if someone has changed the file in the meantime?

DasDing notices on save and asks instead of overwriting the other change.

Can I edit files from the archive?

No, everything there is view-only. Copy the file into your personal area, then it works.

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This guide is also available in the program under 📖 Guides – with jump links to the other guides.