3018 pro with extension kit

I have the 3018 pro with the extension kit. I changed the parameters under “machine/edit/work area” to 300mm x 180mm. The visualizer still shows approximately 150mm x 150mm and it’s forcing me to tile for an 8" x 8" piece of wood. Is there something else I should change to reflect the bigger table size? I’m 65 and had 2 strokes so I need laymans terms when instructing me, lol! Help please! TIA