This sample explains about the image feature by using weekly diet planner as an example. You can change the height and width of the picture by resizing and move it to another position by drag and drop.
In this demo, the image has been inserted in the specific cell position by using the image property in the cell object. You can also insert an image by using the insertImage method.
To enable or disable this feature use the allowImage property in Spreadsheet.
This sample is configured with import and export options. Use Ctrl + O to open an excel file and Ctrl + S to save an excel file with a picture.
More information about the image can be found in this documentation section.