Tucats

I am at my wits end trying to get something to print at or near the center of my heated build plate. I have an Ender 5 pro and the only thing that I can get to print at the center of the build plate is the cat or the dog on the original TF card. Everything else tries to print at the rear right corner (the home position) and results in a blob. Where in Cura can I set the build to happen at the center of the build plate? Thanks for your help. Cheers