How to install BELLO BELLO does not require any installation. It is based on python and it will use the following libraries: Name PySimpleGUI Numpy Pandas matplotlib scipy Seaborn version 4.56.0 1.18.5 1.3.5 3.5.1 1.7.2 0.11.2 How to use BELLO: In the command window launch: python BELLO\ GUI.py It will open the GUI where you have to insert the path to the xyz trajectory and the cell parameters. The format of the xyz file is the standard one such as: ==================================================== 40 Si 41.842400 47.539600 6.383470 Ge 6.467150 34.447601 30.579399 Ge 3.785970 52.582901 39.092499 ... ==================================================== One can use also multiple frames in the same file with the above format. Note that each frame must contain the same number of atoms and they must have the same cell parameters. After setting the input parameters, to use BELLO, click on BELLO at the bottom of the window and the click the Calculate button. The output files will be stored in the same folder of the BELLO executables.