The file manager has a limit of 3500 pixels width and height for images. Any image larger than this will need to be resized before being uploaded to the file manager.


Choose your operating system to learn how to easily resize an image:


Mac OS
Windows OS
Chrome OS


Resize an image on Mac OS using Preview

1. Open the image in Preview

  • Find your image. Right-click or Control + click, and choose Open with > Preview. This will open the image for editing in the Preview application.

screenshot where an image is select and the menus are open showing the open with option selected. The application list is showing and Preview is highlighted.


2. Open the size adjustment settings

  • Once the image is open in Preview, select the Tools option in the main menu bar. Then select Adjust Size.

screenshot of the image open in Preview with the Tools menu option selected and the Adjust Size option highlighted.


3. Adjust the image size

  • In the Adjust Size area, make sure pixels are set as the measurement type, and make sure the Scale proportionally checkbox is selected. Note that the maximum height and/or width for the file manager is 3500 pixels. Make sure that both the height and width are no larger than 3500 pixels.


screenshot showing the Image Dimensions area. Arrows are pointing to the measurements selector and the scale proportionally checkbox,


3. Save the image

  • Once your image is the correct size, select the OK button to save your image.

screenshot showing the Image Dimensions area. An arrow is pointing to the OK button.




Resize an image on Widows OS using Photos

1. Edit the image.

  • Find your image, right-click, and choose Edit. This will open the image for editing in the Paint application.

screenshot where an image file is selected and the 'Edit with Photos" menu option is highlighted


2. Resize the Image.

  • Once Paint launches, select the Resize option in the Home tab.

Screenshot with a image open in the Paint app, and the Resize option is highlighted.


3. Choose a Size.

  • Select the Pixels option and make sure that the Maintain aspect ratio checkbox is checked. Set the desired height or width for the image. Note that the maximum height and/or width for the file manager is 3500 pixels. Make sure that both the height and width are no larger than 3500 pixels.


Screenshot showing the Resize and Skew settings open for the image in the Paint app.


4. Save.

  • Once your image is the correct size, select the Save icon in the upper left corner of the app to save your image.

A screenshot showing the save icon for the Paint app selected.


4. Save the Resized Image.

  • After resizing, choose Save a copy to avoid overwriting the original.


Resize an image on a Chromebook (ChromeOS)

For the most up-to-date information for how to resize images using the Chrome OS, visit the offical Chromebook Help center article for opening and editing images.

https://support.google.com/chromebook/answer/1751068?hl=en