On the slideshow you will get the option to manage the slides. To edit the images o your slide show, click through the slides and choose slide background. You can choose from your own library of images, WIX’s own and even set it as a colour. Different slides will also have different features within them such as boxes and buttons. In the background settings of the images, always use scale to fit unless you want it otherwise. You can also choose for the slideshow to auto play, how long a slide shows for and other options.
This will start to set the colour of that part of the page. Just click the right colour for you. To set the background of the rest of your page. Click on the background element. Here you can choose a colour for this or even add an image. To add an image, click on the image button within the background element. You will see many images from WIX, or you can add your own. The WIX images are usually free to use. You can upload an image from here or use one of your already uploaded images. This is how to upload an image for everything.