Once run the software, you will see iTunes with LIBRARY and PLAYLIST at the left sidebar. Then connect your iPhone to Mac using USB cable and the software will detect iPhone automatically. Users are allowed to transfer App, Books, Movies, Music, Podcasts, Ringtones, and TV Shows from iTunes to iPhone.
Under LIBRARY of iTunes, choose any kind of files for transfer. You can choose certain files with Command key and right click the selected files to “Transfer to > iPhone”.
Or click the Transfer 

However, if you want to search some specific files, the software offers smart filter function 
With above done, transfer process will begin with a pop-up window to show you the transfer process. It will show the name and number of the files transferring. You can click “Stop” 