You may access the documentation for Web Host Manager (WHM), your reseller control panel, here: http://www.cpanel.net/docs/whm/

You may also find our Reseller Start-Up Guide helpful:

CA Customers: http://www.hostpapasupport.com/go/ca/start-up-guide.shtml
US Customers: http://www.hostpapasupport.com/go/start-up-guide.shtml
EU Customers: http://www.hostpapasupport.com/go/eu/start-up-guide.shtml
UK Customers: http://www.hostpapasupport.com/go/uk/start-up-guide.shtml
AU Customers: http://www.hostpapasupport.com/go/au/start-up-guide.shtml
IN Customers: http://www.hostpapasupport.com/go/in/start-up-guide.shtml
MX Customers: http://www.hostpapasupport.com/go/mx/comenzando.shtml

HostPapa also has a number of video tutorials to help you explore and use WHM. You’ll find them here: http://hostpapasupport.com/tutorials/Tutorials_whm.shtml