Enscygen PDF Numbering Toolkit

Welcome to the Enscygen PDF Numbering Toolkit, a professional, privacy-focused browser application for numbering PDF documents. This manual guides you through the application's features, including advanced exclusion logic, custom positioning, and mobile usage.

1. Getting Started

Uploading a Document

Click the "Upload PDF" button in the top header (or the center of the screen on first load).
Select a PDF file from your device.
The toolkit processes the file locally—no data is uploaded to any server—and generates thumbnail previews.

2. Positioning & Styling

The Right Sidebar (or bottom panel on mobile) controls the appearance and placement of page numbers. Changes update in real-time.

Positioning

Control where the number appears using Top, Right, Bottom, and Left inputs.

Default: Bottom: 20px.
Supported Units:

px or pt: Points/Pixels (Standard PDF unit).
%: Percentage of page dimension (e.g., Left: 50% for horizontal centering).
in: Inches (e.g., 0.5in).
cm: Centimeters (e.g., 1.5cm).
mm: Millimeters (e.g., 10mm).
auto: Disables that specific side constraint.

Pro Tip: To place a number in the top-right corner with 1-inch margins, set Top: 1in, Right: 1in, Bottom: auto, Left: auto.

Typography

Font Family: Select from standard PDF fonts: Helvetica (Sans-serif), Times Roman (Serif), or Courier (Monospace).
Size: Font size in points (e.g., 12).
Weight: Toggle between Normal and Bold.
Color: Use the color picker to select any custom color.

3. Numbering Logic

This is the core feature of Enscygen. You can define exactly which pages get numbered and how the counting flows.

The Include / Exclude Toggle

Located at the top of the "Numbering Logic" section:

Include Pages (Default): The logic applies strictly to the pages you list.
Exclude Pages: The logic applies to all pages EXCEPT the ones you list. This is perfect for skipping covers or blank separators.

Defining Ranges

The Page Range input supports complex syntax:

Ranges: 1-5 (Pages 1 through 5).
Single Pages: 10 (Page 10 only).
Commas: 1-3, 5, 8-10 (Combines multiple groups).
Last Page: N represents the end of the document (e.g., 5-N means Page 5 to the end).

Examples (10-Page Document)

Here is how different inputs affect a standard 10-page PDF:

Scenario	Mode	Range Input	Result (Pages Numbered)
Number All Pages	Include	1-N	1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Skip Cover (Pg 1)	Include	2-N	2, 3, 4, 5, 6, 7, 8, 9, 10
Skip Cover (Pg 1)	Exclude	1	2, 3, 4, 5, 6, 7, 8, 9, 10
Skip Cover & Back	Exclude	1, 10	2, 3, 4, 5, 6, 7, 8, 9
Skip Middle Section	Exclude	4-7	1, 2, 3, 8, 9, 10
Only Odd Pages	Include	1, 3, 5, 7, 9	1, 3, 5, 7, 9
Complex Selection	Include	1-3, 9-N	1, 2, 3, 9, 10

The "Start At" Counter

This determines the number printed on the first page of your selected range.

Example: To start numbering on Page 3 but have it say "1":

Toggle: Include
Range: 3-N
Start At: 1

4. Visualization Tools

Thumbnails (Main Area)

Displays a grid of all pages.
Updates instantly to show the approximate position of the number.
Hover over a card to slightly zoom in.

Timeline Palette (Bottom)

A linear strip showing the status of every page.
Blue Box: Page is numbered.
White Box: Page is skipped.
Displays the exact number assigned to that page index.

Enlarged Modal View

Click any thumbnail to open the full-screen modal.
Fit-to-Screen: The view automatically scales the PDF to fit your device's screen without scrolling.
High-Res: Renders sharply on Retina/High-DPI displays.
Navigation: Use the < and > buttons to flip through pages to verify positioning.

5. Mobile Responsiveness

Enscygen is fully optimized for mobile devices and tablets.

Stacked Layout: In portrait mode, the preview area sits at the top, and controls sit at the bottom, allowing you to edit and see results simultaneously.
Touch Targets: Buttons and inputs are sized for easy tapping.
Input Zoom Prevention: Text fields are optimized to prevent auto-zooming on iOS devices.

6. Exporting

Verify your document using the modal view.
Click "Download Numbered" in the header.
The app generates a new file named numbered_document.pdf with vector-based text numbers stamped onto the original pages.

7. Troubleshooting

Q: I selected "Exclude" for page 1, but the numbering starts at 2 on page 2.

A: Check your "Start At" value. If you want Page 2 to say "1", ensure "Start At" is set to 1.

Q: My "50%" position isn't perfectly centered.

A: 50% places the start of the text at the 50% mark. For precise centering, visually adjust the percentage slightly lower (e.g., 48%) or rely on visual alignment in the preview.

Q: Can I use decimals for units?

A: Yes, values like 1.5cm or 0.75in are fully supported.

Enscygen PDF Numbering Toolkit - User Manual