First you can add a category for your post in Posts/Categories
Enter your category title (Slug and Descriptopn if needed) and click Add New Category button
Then go to Posts/Add New:
Enter the title, choose the category and Post Format (more about it in paragraph Post Formats), add a content.
You can add a featured image as well. And add tags (key words) to your Post.
To set your Post’s appearance (for this Post only) go to Shepard Post Options:
You can choose Layout for each page: Right/Left Sidebar or Full Width. When one of the sidebars is enabled, you can set your Custom Sidebar. More about Sidebars see in the relevant paragraph.
You have an opportunity to:
1) Show Sharing Box:
2) Show About Author Box:
3) Show Recent, Popular and Related Box:
4) Enable Middle Sidebar.
Here is an example of how it will look in the Post:
To manage your Post Tags (remove, add, or edit) go to Posts/Post Tags. You’ll get the following window:
Where you will easily add new Tag or find existing one and edit it. You also can see which Tags are embeded to most of Posts.