📘 Ngosha PDF 2026 User Guide

Ngosha PDF is a professional, high-performance, and 100% offline desktop PDF suite engineered for Windows 10 and 11. It brings together ultra-fast document viewing, true in-place page editing, document stamping, multi-language OCR, visual page management, and multi-format conversions into a single, unified interface.

🔒 Complete Privacy Guarantee: Ngosha PDF operates entirely locally on your computer. Your files, documents, and extracted text never leave your machine and are never uploaded to any remote server.

🧭 2. Interface Layout & Navigation

Ngosha PDF is organized into 5 dedicated workspace modes accessible via the top global navigation bar:

📖 PDF Reader: Ultra-crisp document rendering with side-by-side thumbnails, zoom controls, fit width/height, visual search with gold highlights, and single-click image export.
🎨 Markup & Stamps: Apply official rubber stamps (Approved, Confidential, Draft, Paid, Official Copy) or custom text with customizable colors, dates, and page ranges.
🔤 OCR Studio: Extract digital text from scanned documents and photo PDFs using integrated Tesseract-OCR with English and Swahili language models.
📄 Page Manager: Visual card grid displaying every page with one-click reordering, rotation, deletion, duplication, and extraction controls.
🛠️ PDF Tools & Converter: Batch merge, split, watermark, compress, encrypt/password-protect, decrypt, PDF-to-Images, Images-to-PDF, and Excel-to-PDF.

📖 3. PDF Reader & Visual Search

Navigation & Viewing Controls

Page Jump: Type the desired page number in the toolbar box and press Enter or click Go.
Zooming: Use +, −, or the mouse scroll wheel while holding Ctrl to zoom smoothly from 50% to 400%. Click 100% to reset.
Fit Modes: Click ↔️ Width to snap to the window width or ↕️ Page to fit the full page height.
Fullscreen Presentation: Press F11 for distraction-free, full-screen reading. Press F11 or Esc to return.

Visual Search with Highlights

Press Ctrl+F to focus the search bar in the left sidebar.
Type any word or phrase and hit Enter.
Every match is highlighted directly on the PDF page in bright amber/gold boxes.
Navigate sequentially through matches with ▲ Prev and ▼ Next.

✂️ 4. Real Page Editing & In-Place Save

Unlike basic PDF viewers that only allow temporary viewing adjustments, Ngosha PDF provides genuine in-place document editing that alters the underlying document structure and writes changes directly to disk.

Page Operations

🗑️ Delete Page: Removes unwanted pages instantly with safety confirmation. Prevents accidental deletion of the last remaining page.
⬆ Move Up / ⬇ Move Down: Rearranges page sequence up or down immediately. Thumbnails and cards update dynamically.
📄 Duplicate Page: Clones any page and inserts the copy directly after it.
🔄 Permanent 90° Rotation: Rotates the selected page permanently clockwise into the PDF file structure.
📤 Extract Page: Saves the selected page as an independent single-page PDF.
➕ Insert PDF: Appends or inserts pages from an external PDF document at the current position.

💾 Permanent Disk Persistence (`Ctrl+S`):
When any modification is made, the top 💾 Save button illuminates in green with an asterisk (💾 Save *), and the window title displays * [Unsaved Changes].
Pressing Ctrl+S or clicking 💾 Save executes an atomic file replacement on disk, preserving your changes permanently even after closing the application.

🎨 5. Markup & Document Stamps

Apply professional, vector-quality official stamps to your PDF documents in seconds:

Built-in Presets:
- ✅ APPROVED (Emerald Green)
- 🔒 CONFIDENTIAL (Crimson Red)
- 📝 DRAFT (Amber Orange)
- 💳 PAID (Royal Blue)
- 🏛️ OFFICIAL COPY (Purple)
Custom Stamp: Enter any business name, reference number, or verification code.
Positioning: Choose between Top-Right Header, Center Diagonal Watermark, or Bottom-Right Signature.
Date Stamp: Check Include Current Date to stamp the date automatically (e.g. APPROVED • 2026-09-23).
Target: Apply to either the Current Page only or All Pages simultaneously.

🔤 6. OCR Studio (Text Recognition)

Convert scanned agreements, physical book scans, receipts, and image-based PDFs into editable text.

Switch to the 🔤 OCR Studio tab.
Select the recognition language (English (eng) or Swahili (swa)).
Click 🔍 Read Current Page (OCR) to process the visible page, or 📑 Read Full Document to process the entire PDF.
Extracted text appears instantly in the editor box with real-time word and character counters.
Click 📋 Copy Text or 💾 Save as .TXT to export your results.

📄 7. Page Manager (Visual Grid)

The Page Manager presents every page as an interactive visual thumbnail card in a responsive grid layout:

Mini-Action Toolbar: Each card has quick action buttons underneath: ◀ Move Left, ▶ Move Right, 🔄 Rotate 90°, 📄 Duplicate, and 🗑️ Delete.
Right-Click Context Menu: Right-click any card or image to open the comprehensive page menu.
Direct Selection: Click any card to select it and jump to it in the Reader.

🛠️ 8. PDF Tools & Converter Suite

Perform heavy-duty PDF batch processing operations without external third-party software:

Tool	Description
🔗 Merge PDFs	Combine multiple PDF documents into a single organized file with drag & drop ordering.
✂️ Split PDF	Split into single-page documents, fixed page intervals, or custom page ranges (e.g. `1-5, 8, 11-14`).
💧 Watermark	Add custom semi-transparent diagonal text watermarks across pages.
🗜️ Compress	Reduce file size by compressing image streams and cleaning redundant metadata.
🔐 Encrypt	Secure sensitive PDFs with AES-256 password protection preventing unauthorized opening.
🔓 Decrypt	Remove passwords from known protected PDFs for permanent open access.
🖼️ PDF → Images	Convert all pages to high-resolution PNG or JPEG image files.
📑 Images → PDF	Assemble PNG, JPG, or BMP images into a unified multi-page PDF document.
📊 Excel → PDF	Convert `.xlsx` or `.xls` spreadsheets into clean, printable PDF documents.

📥 9. Drag & Drop Anywhere

Ngosha PDF features native Windows Drag & Drop integration:

Open PDF: Drag and drop any .pdf file anywhere onto the application window or canvas.
Empty Canvas Drop Zone: When no document is loaded, a dashed drop zone invites you to drop files or click to browse.
Images: Dropping a photo offers one-click OCR extraction or Image-to-PDF conversion.
Spreadsheets: Dropping an Excel file automatically prepares it in the Excel-to-PDF tool.
Batch Files: Dropping multiple PDFs while in Tools adds them directly to the Merge list.

⭐ 10. Setting as Default PDF Viewer

To ensure all PDF files on your computer automatically open with Ngosha PDF:

Click the ⭐ Set as Default button in the top navigation bar.
Ngosha PDF will register its protocol handlers and open the Windows Default Apps settings.
Select Ngosha PDF and click Set default.
Every PDF document icon will update to the Ngosha PDF badge for seamless one-click opening.

⌨️ 11. Keyboard Shortcuts

Shortcut	Action
Ctrl + O	Open PDF document dialog
Ctrl + S	Save modifications in-place to disk
Ctrl + Shift + S	Save As (new file location)
Ctrl + F	Focus visual search bar
Ctrl + P	Print document (Windows Print Dialog)
F11	Toggle Fullscreen reading mode
F1	Open User Guide & Help Manual
Right Click	Open Page Context Menu (Delete, Move, Rotate, Duplicate)
Ctrl + Scroll	Zoom in / Zoom out smoothly

❓ 12. FAQ & Support

Q: Do I need an internet connection to use Ngosha PDF?

A: No. Ngosha PDF is 100% offline. All viewing, editing, OCR, and conversions happen locally on your PC.

Q: How can I reach technical support or request new features?

A: Ngosha Multimedia provides direct customer support:
WhatsApp: +255 754 644 199
Email: support@ngosha.com
Website: https://www.ngosha.com/