To add a picture to your post:
Click on reply and then scroll down to the bottom of text box.
Click “go advanced” add text to message window and then scroll down.
Click “Manage attachments” A separate window will pop up.
Click “browse” Then select the file to be uploaded from your computer. Be sure that the photo is appropriately sized. 1600 x 1600 pixels (or smaller) and no more than 1 meg in file size. You may select several photos to upload at the same time by repeating the last step.
Click “Upload” After pics have loaded close the pop-up window.
Click “submit reply” to mount the text of your message - photos will automatically appear in post.