How do I use ASCII transfer mode?

I have been trying to install my guestbook and in the tutorial, it says that I should transfer my .cgi files in ASCII mode. However, I don't know how to change the mode because everytime I drag and drop the .cgi files, they would always be transfered in BINARY mode. Can somebody please help?

After you connect to your FTP server, click on this button to switch to ASCII mode. The two buttons to the right, respectively, switch to Binary mode and Auto Transfer mode.

Tip: Go to [Tools] > [Settings] > [Transfer] > [ASCII/Binary], create a *.cgi extension, and set the Transfer Type to ASCII. That will allow your CGI files to always be transferred in ASCII mode.