Presentations
EFA Projection converts your PDF or PowerPoint (PPTX) presentations into images — one per page — and shows them as a series of slides ready to project.
Import a presentation
Section titled “Import a presentation”- Sidebar → Presentations tab → + button or Upload.
- Pick the file (PDF or PPTX) from your disk.
- Give it a descriptive name.
- Click Upload.
The file uploads to the server and is processed in the background:
- PDF: each page is converted to a PNG image.
- PPTX: the server first opens it with LibreOffice, converts it to PDF, and then extracts the images page by page.
While it’s processing, a spinner appears over the presentation in the sidebar. When it finishes:
- On desktop: the spinner disappears and the slides are ready.
- On mobile: you get a push notification.
Limits
Section titled “Limits”- Maximum size: 50 MB per file.
- Maximum count depends on your plan (see Plan and subscription).
Project a presentation
Section titled “Project a presentation”Just like any other item:
- Double-click the presentation in the sidebar → it’s projected.
- Drag and drop to the program.
- Right-click → Project now.
Arrow keys move between pages. Since each slide is a static image (not the original file), the rendering is identical to the source presentation.
PDF vs. PPTX — which to use
Section titled “PDF vs. PPTX — which to use”| PPTX | ||
|---|---|---|
| Render | Exact (font, layout) | 95% — LibreOffice covers most cases |
| Animations | No (not applicable) | Not projected — every slide is static |
| Unusual fonts | Work if embedded | May change if not embedded |
| Diagrams and charts | Always work | Work |
| Processing speed | Faster | Slower (extra LibreOffice step) |
Recommendation: if your presentation has animations, custom fonts, or elaborate layouts, export from PowerPoint to PDF and upload the PDF. It’s more predictable.
Presentations with animations
Section titled “Presentations with animations”EFA Projection converts each slide into a static image. That means:
- ❌ Animations aren’t projected (transitions between slides, text fade ins, etc.).
- ❌ Videos embedded inside a PPTX aren’t projected.
- ❌ Interactive elements aren’t projected.
- ✅ Text, images, charts, and the final layout are projected.
If you need animations or videos in a presentation, consider uploading a video as media instead of a PPTX.
Update an existing presentation
Section titled “Update an existing presentation”To replace the content of a presentation you already uploaded:
- Right-click the presentation → Replace file.
- Pick the new file.
- The app reprocesses the slides; the name and position in programs are kept.
Delete a presentation
Section titled “Delete a presentation”Right-click → Delete. Removes the file from the server and the generated slides. It’s permanent. If the presentation was in active programs, those lose the reference.
Common errors
Section titled “Common errors””Error processing the file”
Section titled “”Error processing the file””Frequent causes:
- Corrupt PPTX or exported from a non-compatible tool (e.g. Google Slides exported as PPTX). Try exporting to PDF and uploading that.
- Size over 50 MB — compress images inside the PPTX or split it into two files.
- Password-protected file — remove the password before uploading.
The slides look different from PowerPoint
Section titled “The slides look different from PowerPoint”This is expected in some cases: LibreOffice covers 95% of layouts but may differ in:
- Non-embedded fonts (substitutes with a similar one).
- Animations (not applicable, the final state is rendered).
- Very complex gradients.
Workaround: export to PDF from PowerPoint and upload the PDF.
Next step
Section titled “Next step”To use standalone images, audio, and video, Media.