It's not available in config tool. You need to add it in manual additions.
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Normal core xy implementation needs 2 virtual steps for a motor step to guarantee that every tiny move gets maximum one step regardless of direction. This can cost some speed, so alternatively you can activate the FAST_COREXYZ by uncommenting the define. This solves the core movements as nonlinear movements like done for deltas but without the complicated transformations. Since transformations are still linear you can reduce delta computations per second to 10 and also use 10 subsegments instead of 20 to reduce memory usage.*/#define FAST_COREXYZ
This activates nonlinear mode like for deltas so these settings take effecta s well (not delta specific). So select delta and set subsegments to 10 and updates per second to 10 and then switch back to corexy.
