@savoj
1. First, on top right of post edit screen you see “Screen options” (don’t know how it’s called in russian) – open it and look form “Featured images” (“Миниатюра…”) checkbox. If it’s unchecked, check it.
2. If there’s no such option it means that your theme doesn’t support featured images. In such case open functions.php file of your theme and add this code (e.g. at the bottom):
add_theme_support( 'post-thumbnails' );
Save the file, refresh dashboard and in case it still doesn’t work go back to step 1.
3. пишите на английском языке пожалуйста. Please use english on this forum.
A.
