To insert an image into your website, log into the interface and click in the menu on "Pages" => "Manage pages" and then select the page in which you want to insert an image.
Click on the button"Insert image" above the editor.
Now the following opportunities are provided:
a.) Upload an image from PC
b.) Browse the server for an existing file
c.) Paste the URL of an image from another website
If you have chosen an image, click on the "OK" button and in the following window you can make several settings for your image.
Click again on the "OK" button and the image will be embedded in your page.
Tip: You can easily insert an image with Drag & Drop, if you move it from your PC to the editor.