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.

How to Insert HTML on Tumblr. The Tumblr website allows you to create and update a simple blog using publishing tools created specifically for Tumblr blogs. While Tumblr comes with a wide variety ...

In order to embed HTML, you actually need to copy the rendered HTML from either an existing web page or WYSIWYG HTML editor and then paste it into Gmail.