Click on the Image Manager.
From here you can upload new pictures and manipulate them (resize, crop, rotate, etc.). Select the folder in which you wish to store the new image. To upload, click on the Upload icon at the top of the Image Manager. Click "Select" to browse your hard drive for an image. Click on the image file and click Open. To add multiple images click Add and create more file path fields. When you have selected all the images you want to upload, click Upload.
To place an image on the webpage, select the image and click on the Insert icon or double click the image.
To manipulate an image, click on it to highlight it and click on Image Editor.