What are you trying to do?
You can upload photos from your PC, or photos that are on the web.
Once the picture is in the module, you can leave it full size across the page, or nest it inside a text module. To nest it, see the list of modules on the right, identify the photo module you want to nest, double click it so it resizes to half the width, then drag/drop it up the list until it's dropped onto the text module you want it to be nested in. You'll need to drag the photo module just a tiny bit higher than the text module and cnce you've let go it will be overlapping the text module item in the list. Then press the REORDER button at the bottom of that lot and it will be nested.
Hope that helps.