When you have written your text, at the bottom of that section there are three buttons, Create Thread, Upload a File and More Options. Click on upload and choose the image you want to upload from your PC, and double click it. When it is attached to your post, click on Full Image. Repeat for each image you want to upload. When complete click Create Thread
A couple of fine points: - You can upload each image and after you have them all uploaded you can click one button to full size all of them at once, - The photos will appear in your text top to bottom in the order in which you uploaded them. - Wherever your cursor is located in the text of your message is where your photo will appear in the text. This way you can decide how to present your photos.
