The SHARE PROJECT window will pop up. Click on the BLOG POST button.
The blog post button will open additional fields to allow you to enter your POST TITLE and POST CONTENT. Then select your preferences for your images: USE COVER IMAGE or CREATE AUTO-COLLAGE WITH FIRST 15 IMAGES and select the gallery you'd like to use images from.
Lastly, select your publish options. Select PUBLISH if you'd like to publish the blog post immediately. If you'd like to make more specific changes to the blog post before publishing (i.e. tags, author, etc), select the CREATE DRAFT option and you'll be redirected to the blog control panel to finish your post.