You can insert an image into your text field by using the Canvas Upload and Embed tool. Click the Upload and Embed tool button and a new window will appear.
For Step 1 click Choose an Image to select the image from your computer.
For Step 2 click Select All to select the entire image and then Crop Image.
Rename your image if needed and click Upload and Embed to add it to your text box.
You will now see your image in your text entry box.