Scroll below the image for an explanation of the features, or watch Elise’s screencast that walks you through the process.
NOTE (8/1/2013): A recent WordPress upgrade changed the interface of the media library a bit. However, it is pretty intuitive and the main components are the same (just shrinked into a little sidebar on the right in your “gallery.” You’ll see…..
(1) Edit image: This takes you to WordPress’ build-in image editor, which is worse than almost any dedicated photo editor out there, including the free, online service Pixenate. (I.e. Use something else instead.)
(2) Title: This doesn’t display publicly, but will by default show up as the alternate text for the image. (Sighted folks see this when they mouse over the image for a second. Blind folks will hear this read aloud in place of the image.)
(3) Alternate text: See the description of alternate text, above. Change this if you want this text to be different from the title. If you use a clear title, you can leave this blank.
(4) Caption: Does what it says on the tin. This is important. Write a readable, descriptive caption that accurately relates the image to the post. If you’re using a conceptual image to punctuate the post, use an interesting fact to relate the image to your post.
(5) Description: This doesn’t appear publicly, and is optional. If you’d like, add descriptions or keywords here that will aid you in finding this image later.
(6) Link URL: What you’d like the photo to link to. Always change this from the default setting, whether by removing the link altogether (hit the “None” button), or by pasting in the URL the photo came from (e.g. a Flickr photo page).
(7) Credit: Who took the image.
(8) Organization: The organization that hosts the photo or employs the photographer. (e.g. Flickr, Getty Images)
(9) Can distribute? Can we republish this image in other contexts? Check this if this is an image you took yourself, or if you otherwise hold full rights to the image.
(10) Alignment: Self-explanatory. Select “left” or “right” to float the photo alongside your text, or “center” to place the image in the center of a line by itself.
(11) Size: Self-explanatory. If it’s a strong editorial image, consider playing it big, selecting “Large” from the menu. If it’s included just to add visual emphasis, make it “Medium” and float it left or right.
(12) Insert into post: Click this to place the photo in your post wherever the cursor was when you brought up the “Add an image” dialogue box.
(13) Use as featured image: Click this to make this image the thumbnail for the post in the skybox (Argo theme only).
This is the product of the choices I made in the "Add an image" dialogue box shown above. Note the title, displayed against a yellow highlight in the lower right when I moused over the photo.