So, now you have a picture on your page. But we have to fill in a little bit more.
When you have clicked on the pencil, you enter this scene
You can display the picture on the left, center and right, most of the time the text will go around the pictures. Or you choose none and it will enter itself on a apropriate place.
The sizes:
Tumbnail 150-150
Medium 225x300
Large 768x1024
Full Size 960x1280
When you want your picture appear in another size, you choose "Costum Size"
You can see that in the picture above, you can adjust the size with the arrows next to 225 x 300
Then you have to fill in where you want your visitors to go when clicking on your picture.
Media file = your picture opens in the same window,
Links your picture directly to the original, full-size version of the file.
Attachment page = it opens in the same window,
Links your picture to WordPress media attachment page.
Costume url = You can add an extern or intern url to the picture/ an affiliate link f.i.
None= You can not click the picture. It becomes un-clickable.
When you have filled in the options you want you can click "insert into page"