The files are on your hosting account server. You access them using an FTP program like Filezilla or (my choice) the FireFTP plugin for Firefox.
Once you've downloaded the file you want to edit, you'll open it in a text editor (I use Notepad and Notepad ++), make your changes, then upload the file back to the server.
Always a good idea to set up your CUSTOM template before editing stuff:
https://www.zen-cart.com/tutorials/i...hp?article=230
https://www.zen-cart.com/tutorials/i...hp?article=142



