Reply To: Few Issues in one Ticket

Hello,

1) Please provide a screenshot of the backend which element did you used to add the image in the size guide to check it myself and help you out accordingly.

2) The URLs are displayed by means of the permalinks. You can set permalinks according to your needs from Settings >> Permalinks.

You can read the following article for further help:
https://www.wpexplorer.com/change-permalinks-wordpress/

Best Regards.