The Basic Steps to Scan Anything

Scanning turns a physical document or photo into a digital file your computer can store and share. The process is the same whether you are scanning a letter, a receipt, a family photo, or a multi-page contract: place the item in the scanner, open the scanning software on your computer, choose your settings, and press scan.

Most scanners connect to your computer through a USB cable. When you plug in the scanner, your computer automatically installs the driver software — the instructions that let your computer talk to the scanner. Once the driver is installed, you can open the scanning software (usually called a scanner app, TWAIN driver, or the scanner's own program) and begin scanning right away.

The whole process takes two to five minutes per document, depending on the quality you choose and whether you are scanning one page or many. The file saves to your computer as a PDF, JPG, or PNG — formats you can open in any web browser or document reader.

Key Takeaways

  • Place your document face-down on the glass or face-up in the automatic feeder, depending on your scanner model.
  • Open your scanner's software on your computer, choose a resolution (300 DPI for documents, 600 DPI for photos), and select color or black-and-white.
  • Press the Scan button in the software or on the scanner itself, and the file will save to a folder you choose.
  • Most scanners come with their own software, but you can also use Windows Fax and Scan (Windows) or Image Capture (Mac) if you prefer.
  • Flatbed scanners work best for single pages and photos; automatic document feeders work best for stacks of pages.

Where to Place Your Document

How you position your item depends on what kind of scanner you have. A flatbed scanner has a glass surface where you lay the item flat. Lift the lid, place your document or photo face-down on the glass (the side you want to scan facing the glass), close the lid gently, and you are ready to scan. Flatbed scanners work well for single pages, photos, small books, and anything fragile.

An automatic document feeder (ADF) is a tray on top of the scanner where you stack multiple pages. Place your stack face-up in the tray, align the edges, and the scanner pulls each page through one at a time. This is much faster for scanning ten pages or more, but it can jam or misalign if pages are wrinkled, folded, or stuck together. Always fan the stack before loading it.

If your scanner has both — a flatbed and an ADF — use the ADF for clean, straight pages and the flatbed for anything that might jam or needs special care.

Choosing Your Scanning Settings

Before you press scan, you will choose a few settings in your scanner software. The most important is resolution, measured in DPI (dots per inch). Higher DPI means a sharper, larger file. For text documents you plan to read on screen or print, 300 DPI is standard and keeps the file size reasonable. For photos or documents you want to zoom into, use 600 DPI. For archival copies you may never enlarge, 200 DPI is enough.

Next, choose color mode: color, grayscale, or black-and-white. Color files are largest; grayscale is smaller and works well for most documents; black-and-white is smallest and best for text-only pages with no photos or shading. If you are unsure, start with grayscale — it handles most documents well.

You will also choose a file format. PDF is the standard for documents because it preserves layout and looks the same on any device. JPG works for photos. PNG is good if you need transparency. Most scanner software defaults to PDF, which is the right choice for almost everything.

Opening Your Scanner Software and Starting a Scan

Your scanner came with software — often called the scanner app, the manufacturer's scanning program, or a TWAIN driver. Look for it in your Start menu (Windows) or Applications folder (Mac). Common names include Canon ImageRunner, Epson Scan, HP Scan, or Xerox straightforward Printer Manager. If you cannot find it, check the disc that came with your scanner or read it from the manufacturer's website.

Open the software and you will see a preview window and a settings panel. Place your document in the scanner, then click the Preview button. The scanner will take a quick, low-quality scan so you can see what you are about to capture. Check that the document is straight and fully visible in the preview. If it is crooked or cut off, remove it, adjust its position, and preview again.

Once the preview looks right, adjust your DPI, color mode, and file format if needed. Then click the Scan button (sometimes labeled Scan, Capture, or Start). The scanner will run a full scan at the resolution you chose. When it finishes, the software will ask where to save the file. Choose a folder you will remember — your Documents folder or a Desktop folder labeled "Scans" works well.

Scanning Multiple Pages Into One File

If you are scanning a multi-page document and want all pages in a single PDF file, use your automatic document feeder or scan pages one at a time and combine them later. Most scanner software has a "batch scan" or "continuous scan" mode that lets you scan page after page without stopping. Load your stack in the ADF, open the software, and look for a checkbox that says "scan multiple pages" or "continuous mode." The scanner will pull each page through and add it to the same file automatically.

If your scanner does not have this feature, scan each page separately and save them with numbered names (page-1, page-2, page-3). Then use free software like ILovePDF, Smallpdf, or PDFtk to combine them into one file. On Windows, you can also use the built-in Print to PDF feature: open each scanned image, print it to PDF, and add it to an existing PDF file.

Common Mistakes and How to Avoid Them

The most common mistake is scanning at too high a resolution. A 600 DPI scan of a ten-page document can be 100 MB or larger, making it slow to email or upload. Unless you are scanning photos or need to zoom in, stick with 300 DPI. Another mistake is placing the document upside-down or sideways. Always check the preview before you scan — it takes five seconds and saves you from scanning the wrong way.

Dust and smudges on the glass will show up in your scan. Before you scan, wipe the glass with a soft, dry cloth. If you are scanning a stack of pages in the ADF, make sure pages are not stuck together and that the tray is clean. Paper jams usually happen because pages are wrinkled or the tray is misaligned.

Finally, do not forget to name your file something you will recognize. "Scan001" is straightforward to lose; "2024-tax-return" or "car-insurance-policy" is not. Most scanner software lets you type a name before you save, so use it.

Using Windows Fax and Scan or Mac Image Capture Instead

If your scanner software is slow or confusing, you can use built-in tools instead. On Windows, open Windows Fax and Scan (search for it in the Start menu). Click File, then New Scan. Choose your scanner from the dropdown, adjust resolution and color mode, and click Scan. The interface is simpler than most manufacturer software and works with almost any scanner.

On Mac, open Image Capture (in Applications > Utilities). Select your scanner from the Devices list on the left. Place your document in the scanner, choose your settings, and click Scan. You can save directly to your Desktop or Documents folder. Both tools are free and built into your operating system, so there is nothing to install.

Frequently Asked Questions

What DPI should I use for scanning old family photos?

Use 600 DPI for photos you want to preserve and may enlarge or print later. If you are just making a digital backup to view on screen, 300 DPI is fine. The file will be larger but worth it for irreplaceable photos — you can always compress it later if you need to email it.

Can I scan directly to my phone or tablet?

Some newer scanners have wireless or Bluetooth capability and come with a mobile app. Check your scanner's manual or the manufacturer's website. If your scanner does not have this feature, you can scan to your computer and then transfer the file to your phone, or use a smartphone camera app designed for document scanning (like Adobe Scan or Microsoft Lens) instead.

My scanner is not showing up in the software. What do I do?

First, check that the USB cable is plugged in firmly on both ends and that the scanner is powered on. Restart your computer — sometimes the driver does not load until after a restart. If it still does not appear, uninstall and reinstall the driver from the manufacturer's website. You can also try opening Windows Fax and Scan or Image Capture to see if your computer recognizes the scanner there.

What file format should I use if I want to edit the scanned document later?

Scan as a PDF, then use free software like PDFtk or Smallpdf to edit it, or convert it to a Word document using a tool like ILovePDF. If you want to edit text directly, you can also use OCR (optical character recognition) software, which reads the text in your scan and converts it to editable text — but OCR works best on clean, printed documents, not handwriting.

How do I scan a document that is larger than the scanner glass?

Scan it in two overlapping halves. Place the left half on the glass, scan it, then slide the document to the right so the right half is on the glass and overlaps slightly with where the left half was. Scan the right half. Then use free software like Hugin or a PDF editor to stitch the two images together, or straightforward keep them as separate pages in a PDF.