How to Edit Image Size in HTML on Tumblr. If your blog images are too large, users may have to scroll to see them. Make the images too small, and blog visitors might not notice them.

Set your image up within your text and add a "style" attribute tag. For instance, the HTML code for your image might look something like this: Define the border within the "style" attribute.

You can turn on your own screen reader, or "Inspect" the page's HTML code to see what alt text has been assigned to the image. Check out the products mentioned in this article: Apple Macbook Pro ...