Use the dropdown to select a lattice of your choice.

Left click and drag to move the camera around. You can use the mouse scroll wheel to zoom in or zoom out. You can use the select camera button to switch between orthogonal and perspective cameras. You can use the slider to increase or decrease the radius of atoms for better visibility.

To select atoms, click on the select atoms switch. It is to be noted that the select atoms option is a toggle switch. Left click to select, richt click to de-select in select mode. Once you have made your choice, click on the check vectors button to get the result of your choice.

Please select in order, atoms which you think make up the primitive vectors. The first two choices are considered to be the head and tail of first vector and so on. Hence make your choices accordingly. You can always use the clear selections button to clear all choices.