You can embed images from your personal files in Canvas into the Rich Content Editor. You can also add alt tags to your images for better accessibility.
You can only embed images that have been previously uploaded to your personal or course files. However, as an instructor, you have the option to upload images to your course files using the Content Selector. If a change is made to the image in your personal files after it has been embedded, the image you have added to the Rich Content Editor will not be changed.
Open Rich Content Editor
Open the Rich Content Editor using one of the Canvas features which support the Editor.
Open Course or Personal Files
You can choose to embed images located in your course files  or your personal files . As an instructor, you can embed any image from your files into the Rich Content Editor, even images that are in folders not visible to students.
If you would like to embed an image that is not yet uploaded, you can upload images into your Course Files using the Content Selector.
Note: When accessing course files, students will only be able to see images that are public to the entire course.
Click the image you wish to embed .
The Attributes field will populate the Alt text , which is the name of the image, along with the image's default dimensions . Dimensions are referenced in pixels, width x height. For better accessibility, change the Alt text to an alternate description that describes the image.
Note: If you want to include an image title, which will appear when a user hovers over the image, embed the image and then switch to the HTML Editor. Title tags must be manually added to the HTML code.
Change Attributes Image Dimensions
To change the image dimensions, type in the number of pixels you would like for the new image width . Then click the tab key on your computer keyboard. Since Canvas maintains the aspect ratio of your image, the entry for the image height will be changed automatically .
Click the Update button.
Note: As a future shortcut, if you do not need to change any of your image's attributes, locate your image and simply double click the name of your image. The image will be embedded directly to your post.
View Embedded Image
View your embedded image in the Rich Content Editor.
Edit Image Properties
To edit an existing image, click the image , then click the Image icon . The insert/embed window will appear to make changes.
When you edit an existing image, the URL tab will display the location of the Canvas image; however, the Canvas tab will still display the file. The attributes will remain the same across all tabs and can be edited as necessary.
If you want to replace your Canvas image, click the Canvas tab  and locate another image.
Visually Resize Image
You can also use the handles around the image to visually change the image size. To do this, click the image, then hover over one of the white bounding boxes until your cursor becomes an arrow. Drag and resize the image. Please note that the image will always retain its aspect ratio as to not become distorted.
Note: The Rich Content Editor does not support image cropping.