Editing and export problems

My latest changes are missing

Stop editing and refresh the presentation to check its latest saved state.
Confirm that you opened the correct presentation and account.
If the presentation is shared or duplicated, make sure you are editing the intended copy.
Duplicate the recovered presentation before making more changes if you are unsure which state is current.

Select the slide or object you want to change before opening the assistant.
Ask for one specific change at a time.
Identify what must remain unchanged, such as the slide layout, wording, colors, or other objects.
Undo an unwanted result before sending a more precise instruction.

For example: On slide 4, shorten the selected paragraph to three bullets. Keep the figures, title, and layout unchanged.

Wait for any active generation or editing task to complete.
Refresh the presentation, then try the export once more.
Test a short presentation in the same format. If it exports, duplicate the affected presentation and remove groups of slides to identify the problematic slide.
Try the other export format to determine whether the problem affects PPTX, PDF, or both.

Open the file in the application your audience will use. PowerPoint, browser previews, and PDF viewers can render the same file differently.
Check for text overflow, cropped images, substituted fonts, chart labels, table widths, and objects outside slide boundaries before export.
Replace unavailable custom fonts with common fonts, or ask the workspace administrator whether the required fonts are installed.
Compare the exported result with Presenton’s editor preview and note the slide numbers where they differ.

Confirm /app_data is writable and has enough free disk space.
Check application and rendering logs when AI edits or exports fail.
Verify the export runtime can reach its internal render page and required assets.
Check available memory and confirm custom fonts are available to the renderer.