This short tutorial shows how to enable pages/posts configuration options. As you know pages and posts in WordPress are configured through WordPress administration panel. However you can meet the issue when some configuration blocks are missing like: Categories, Post Tags, Featured Image, Excerpt, Custom Fields etc.
To enable these blocks and get full control over WordPress posts or pages please open any post or page (in the WordPress admin panel) and look at the top right corner of your screen. There you should see the Screen Options button.
Click it please. You should see the following:
Please check the options to enable the configuration blocks.