Uploading images
Images are an important way to break up the text on the pages you publish, and to communicate to your site visitors through non-verbal means. Before an image can be published in a web page it must be scaled to the appropriate resolution, and then uploaded to the web server.
The image manager is the best way to upload images. It allows you to sort your images into meaningful folders, and it automatically creates a thumbnail for each image that you upload.
You should scale images to the right size before uploading them. If you don't have an image editor then download this one, or use this online image scaling tool