Programmable Characters On An Expanded VIC

I have been designing my own programmable characters on the VIC-20 (unexpanded) and find this very useful. I am completely unable to figure out how to use programmable characters if 8K or more of memory is added to the VIC-20. Could you please explain how this can be done?

Neil Boyle

See "Understanding VIC High Resolution Graphics," COMPUTE' December 1982.