The system-related settings have been moved to the top-right corner.
Image Modifiers (art styles, tags etc)
Type a prompt and press the "Make Image" button.
You can set an "Initial Image" if you want to guide the AI.
You can also add modifiers like "Realistic", "Pencil Sketch", "ArtStation" etc by browsing through the "Image Modifiers" section and selecting the desired modifiers.
Click "Advanced Settings" for additional settings like seed, image size, number of images to generate etc.