The top half of the program window is the 2D drawing view. Use the toolbar along the top to perform different actions such as navigating with the camera, aligning components and much more.

It can sometimes be an advantage to use one view at a time as this gives you more space to design. You can choose to view the whole drawing area in 2D by clicking the Switch to single 2D view icon in the top right corner of the 2D View. You can also choose to open a separate 2D view.

To open the Paper View, click on the icon Switch to paper view.

Toggle buttons to switch to a full view or Paper View

Resizing the program window will automatically adjust the toolbar to fit the screen which is why you will sometimes see one row, and sometimes two.
2D view of the drawing area