RixSlides opens .pptx decks the way they look in PowerPoint — and saves them the same way. The pptx engine parses the existing package and patches only the elements you change, which is why masters, layouts, animations and theme colors survive every save. This page covers what opens, what the engine preserves and how to hand a deck off in other formats.
Opening PowerPoint decks
Rixoffice opens presentation files directly:
- .pptx — modern PowerPoint decks open natively in RixSlides with high-fidelity rendering.
- .ppt — legacy PowerPoint 97-2003 files open through a compatibility filter and can then be saved as .pptx.
Open from the Home screen, with Ctrl+O (Cmd+O on Mac) or by double-clicking the file. The deck appears in its own tab with slide thumbnails on one side and the canvas in the center, so you can jump between slides as fast as you can click.
What you see on the canvas
The canvas renders what the file actually contains: the master's background, the layout's placeholder positions, theme fonts and colors, images in their exact frames, charts, SmartArt diagrams and animation markers. You are editing the real deck, not an approximation of it, which is why what you see is what the audience gets.
Saving with byte-fidelity element patching
Presentations are packages of parts: slides, layouts, masters, media, theme definitions. Many editors rebuild the whole package on save and quietly drop or flatten parts along the way. RixSlides does the opposite — byte-fidelity element patching:
- The pptx engine parses the existing .pptx package and keeps every part it does not need to change.
- Only the slide elements you edited — a text box, an image, an animation timing — are rewritten.
- The patched elements are spliced back into the original package.
- The file saves in place with the untouched parts exactly as they were.
Because the engine is a full pptx parse/patch/save implementation, the deck you save opens in PowerPoint without warnings, and the design work someone else did stays theirs.
What the pptx engine preserves
| Deck part | What happens when you save |
|---|---|
| Slide masters | Preserved; your edits inherit them as designed |
| Layouts and placeholders | Kept with their positions, sizes and prompt text |
| Theme (colors, fonts, effects) | Untouched unless you change it in the theme editor |
| Animations and transitions | Kept, including timings on edited elements |
| SmartArt | Stays a native, editable diagram |
| Comments | Preserved for review workflows |
| Custom geometry and shapes | Written back as authored |
| Charts | Kept as native chart parts |
Exporting a finished deck
When the deck is done, RixSlides gives you three clean exits:
- PDF — File, Export as PDF produces a fixed, shareable copy that prints predictably anywhere.
- PNG images — export slides as pictures for docs, wikis and chat threads; details in the PNG export guide.
- .pptx — the native save keeps the file fully editable for colleagues in PowerPoint.
Building a deck from scratch
Prefer to start empty rather than editing an existing file? AI deck generation is built in: describe the deck in a sentence, and RixSlides plans and writes slides into a real .pptx structure. Every plan includes an allowance of AI deck pages — Starter includes 5 pages per month (decks up to 20 pages), Standard AI 10, Pro 30 and Premium 45 or more — and manual editing is always free and offline.
What to explore next
- RixSlides getting started tours the canvas, animations and AI deck generation.
- Export PDF and PNG walks through the sharing options step by step.
- The byte-preserving engine explains the patching approach shared across the suite.