I. Signature Tutorial for Computer Browser (Using Google Chrome as an Example)

1. Download the PDF：

2. Open the PDF in Google Chrome and Click the Drawing Button:
   1. Click the drawing button circled in the image, and sign your full name and the signing date at the bottom.
   
3. Download the Signed PDF:
   1. Click the download button in the top right corner and select "with your changes" to save.
   
   
   

II. Signature Tutorial for iPhone

Specific Operation Steps

1. Open Notes App and Start Scanning:
   1. Open the “Notes” App (pre-installed on iPhone).
   2. Click the “New Memo” icon (pencil and paper) in the bottom right corner.
   3. In the bottom toolbar, click the camera icon and select “Scan Documents.”
   4. Place the paper agreement or document flat on a table, align it with the camera (the App will automatically detect edges and scan; if manual scanning is needed, press the volume button or shutter button).
   5. Drag the corners to adjust the scan boundaries, then click “Keep Scan.” Multiple pages can be added.
      
      
2. Add Signature:
   1. After scanning, click the generated document thumbnail.
   2. Click the share icon (box with an arrow) in the top right corner, then select “Markup” (looks like a pen in a circle).
   3. In the markup interface, click the “+” add button in the bottom right corner, then select “Signature.”
   4. If a signature already exists, add it directly; otherwise, click “Add or Remove Signature,” draw your signature with your finger on the screen (you can try multiple times to select the best one), and click “Done.”
   5. Drag the signature to the appropriate position in the document, adjust its size, then click “Done.”
      
      
3. Save and Share:
   1. Click “Done” in the top right corner, and the signature will be embedded in the PDF.
   2. Click the share icon again, select “Save to Files” (Files App), “Mail” to send, or “AirDrop” to share with others.
   3. The PDF will be automatically saved in Notes for future viewing or export.
      
      

III. Signature Tutorial for Android Phone

Method 1: Using Google Drive to Scan and Sign

1. Scan Document:
   1. Open the “Google Drive” App (pre-installed or downloadable from Google Play).
   2. Click the “+” button in the bottom right corner and select “Scan.”
   3. Use the phone camera to align with the paper agreement or document, adjust the edges, then click “Done” (or use the shutter button to scan).
   4. Multiple pages can be scanned, and after completion, click “Save.”
      
      
2. Add Signature:
   1. Open the newly scanned PDF, click the three dots (more options) in the top right corner, select “Open with,” then choose “Google PDF Viewer” or “Markup” (if available).
   2. Click the pen or brush icon to enter editing mode.
   3. Select “Add Signature” (or use the handwriting tool), draw your signature with your finger on the screen.
   4. Drag the signature to the appropriate position, adjust its size, then click “Save.”
      
      
3. Save and Share:
   1. After saving, the PDF will be stored in Google Drive.
   2. Click the share icon to send via email, WhatsApp, or other applications.
      
      

Method 2: Using a Brand-Specific App (e.g., Samsung Notes)

1. Scan Document:
   1. Open the “Samsung Notes” App (pre-installed on Samsung phones; other brands may have similar apps like “Notes” or “My Files”).
   2. Click “+” to create a new note, then select “Scan Document” (or use the camera icon).
   3. Align the document with the camera to scan, adjust it, then save as a PDF or image.
      
      
2. Add Signature:
   1. Open the scanned result, click the pen or markup tool.
   2. Use an S Pen (if available) or your finger to draw the signature.
   3. After signing, save to the note or export as a PDF.
      
      
3. Save and Share:
   1. After exporting as a PDF, save it to “File Manager” or share with others.