You can automatically add a thumbnail image of your image at the same time you save your image. To save your image, use the Save current image as... command (File menu). This command runs the Save Image As dialog box. You use the controls under the Thumbnail index heading on this dialog box to create and update thumbnail index web pages.
You’ll need to create a new thumbnail index before you can insert the first thumbnail. Press the Create new thumbnail index... button to run the Thumbnail index properties dialog box. You’ll select a thumbnail index template and make choices about the size and style for the thumbnails. If you’d like to see what the thumbnail index will look like, press the Preview button to display a sample web page in your computer’s web browser.