[Feature Request] Multi-image to PDF: Add Merge option with visual thumbnails and reordering

[MahmoudhassanGX]

Current Behavior

Converting multiple selected images always exports each image into an individual separate PDF file.

Proposed Improvement

When multiple images are selected for PDF conversion, provide two conversion modes:

1. Split / Separate files (Current behavior): Each image exports to its own PDF.
2. Merged into a single PDF: Combines all selected images into one multi-page PDF document.

UI Enhancement for the Merged Mode:

• Provide a preview modal/dialog displaying image thumbnails (not just file names), so users can visually verify photos with similar or generic filenames.
• Allow manual reordering (e.g., drag-and-drop or Up/Down buttons) to define page sequence before generating the final PDF.

Benefit

Greatly simplifies workflows for scanning documents, receipts, or multi-page photo collections without needing third-party PDF merge tools.

[MahmoudhassanGX]

Note on "Out-of-the-Box" Experience & Defaults

It’s very possible that some of these tools or capabilities already exist under the hood or can be enabled via deep configuration. However, from a practical UX and user-retention perspective:

1. Users Rely on Defaults: The vast majority of everyday users stick to the default settings and rarely dive into advanced or hidden menus.
2. First Impressions Drive Retention: If an essential feature (like clean PDF text export or intuitive multi-image merging) doesn't work well out of the box, users often assume the software simply lacks the capability.
3. Preventing Churn: Instead of digging through complex settings, users typically uninstall the app and search for ready-made alternatives.

Takeaway:
Surfacing these capabilities through smarter default settings (rather than burying them behind manual configuration) will dramatically improve user retention and make the application feel polished and reliable from the very first run.

[KnifeLemon]

Thanks! Merging is there already: drop several pictures on Merge PDF (back of the images donut) and they become one PDF, in the order you dropped them. A window with thumbnails to put them in order first isn't there yet; that part stays here as an idea.

[MahmoudhassanGX]

Verification Note: Aligned with the current image donut layout in Filee-main as of October 28, 2026, at 09:10 UTC[cite: 1].

Following up on the user flow for multiple images:

The term "Merge" often creates mental friction or confusion, as many users associate it strictly with joining existing PDF documents rather than converting images.

To make the experience completely intuitive for non-technical users ("zero cognitive effort"), the choices presented when dropping multiple images should answer the exact user intent directly:

1. One PDF:
   • Immediately compiles all selected pictures into a single, multi-page document.
2. Separate PDFs (Individual):
   • Converts each selected image into its own standalone PDF file.

Why this is much better for everyday users:

• No Ambiguity: The user doesn't have to think about "merging pipelines"—the labels describe the exact outcome.
• Pure Usability: The user just drags their images and picks whether they want "One PDF" or "Separate PDFs" without needing to learn the underlying engine behavior.

[KnifeLemon]

Thanks! Slice names can be changed: Settings → Presets → pick the preset → change its name, and the slice shows that name. So "One PDF" works today if you prefer it.

The window with thumbnails to put the pictures in order before merging stays here as an idea.