In addition to text and video posts, you can post pictures for your Tumblr blog followers of your own artwork or of your latest trip abroad. Create a photo post on Tumblr by clicking the Photo icon at the top of your blog.
Click the Photo icon at the top of your Tumblr blog.
Select a photo to upload by clicking the Upload Photos icon. Alternatively, click Add Photo From Web to enter a link to an image hosted on another website.
Enter a caption in the text field. While captions are optional, they provide context for the picture or credit its author.
Add tags to your post. Tags -- while optional -- help users find posts related to specific topics and can bring additional traffic to your blog.
Click Post to finish uploading the photo to your blog. Alternatively, click the arrow next to Post if you want to save the post as a draft or publish the photo at a later time using Tumblr's Scheduled posts feature.