Determine an image's file size and dimensions

Know an image's file size and dimensions before or after uploading it into the Library

When working with images, it's helpful to know the size so that you don't run into upload or display issues. Here's what you need to know to check the image dimensions:

• Before Uploading to the Library on a Windows PC
• Before Uploading to the Library on a Mac
• After Uploading to the Library
• After Uploading to the Library while Editing an Email

Important: Images that don't match the image size guidelines may cause errors when you try to upload them to your Library or may not display properly in your campaigns.

Before Uploading to the Library on a Windows PC

If your image is too large, use image editing software, like Photo Editor, MS Paint, or Paint 3D for Windows, to resize or crop the image before you upload it.

File Explorer (Windows 10)

Open the image in File Explorer to check dimensions and file size:

1. Type "File Explorer" into the search bar.
2. Open File Explorer.
   
   
    
3. Find the image you want to check.
4. Place your cursor over the image name until the hover text with the image dimensions appears.
   
   

Windows Explorer (Windows XP, Vista, 7, or 8)

Open the image in Windows Explorer to check dimensions and file size:

1. Click the Windows Start button on your taskbar.
   
   
    
2. Type "Windows Explorer" or "File Explorer" into the search bar.
   
   
    
3. Open Windows Explorer.
   
   
    
4. Find the image you want to check.
5. Select your image. The dimensions and file size appear at the bottom of the window.
   Note: If the image's dimensions and file size don't display at the bottom of your Windows Explorer window, then your window is too small. Expand Windows Explorer to make them appear.
   
   

For more help finding image dimensions on a Windows PC, please see Microsoft's Support.

Before Uploading to the Library on a Mac

If your image is too large, use image editing software, like Preview, iPhoto, or PaintBrush for Mac, to resize or crop the image before you upload it.

Control+click on an image to see an image's properties.

1. Click Finder on your Dock. 
   
   
    
2. Find the image you want to check. Control+click (ctrl+click) your image.
3. Click Get Info. A window appears. 
    
   
   
4. Expand the General: section to see your image's file size.
    
   
   
5. Expand the More Info: section to see your image's dimensions. 
   
   

For more help finding image dimensions on a Mac, please see Apple's Support.

After Uploading to the Library

If your image is already uploaded, there are image editing tools available in the Library.  

1. Click Library.
2. Find your image and look at the info in the Size column.
   
   

After Uploading to the Library while Editing an Email

You can correct some display issues from within your email draft by scaling the image size to fit the block, or cropping the image.

1. Click on the image to open the toolbar and click Replace.
   
   
    
2. Click Edit.
   
   
    
3. Click Transform and look at the "Lock Resolution" box to see the dimensions.
   
   

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