To edit the post, you must perform the following steps:
1. Choose "Posts list" in the main menu
2. Click on the post you are interested in (in the area where there are no buttons)
After that, the editing page will open.
Keep in mind that you can not change the id/name of the post.
Click button "Save" ( in action menu) to save it

Then you can click "Back" ( ) to return to the previous page.