Follow this process:
- Create (or edit) your page or post.
- Click “Add Media” button.
- Upload your picture or select a picture from your media library. (Edit it if it is sideways or upside down before embedding it.)
- After cropping or making other edits, scroll down to find the “Attachment Display Settings” window in the lower right corner. From the drop down menu next to “Link To,” select Media File. Medium is a good size for your embedded pictures.