If you want an enlargement of a picture, just click on that picture
The loading of the pictures may take some time. It has to do with the (digital) size of the picture and the speed of your internet-connection.
In the left column, you'll find the different categories in which the pictures are divided. In order to go back to the other pages, click on the button "Welcome" and then the menu which you had before opening the pages with the pictures, will open.