Using MCUXpresso memory map editor editing memory map for "Hello World" from EVK RT1024-SDK results in this message when executing Debug:
"Break at address "0xdeadbeee" with no debug information available, or outside of program code."
The memory change is size of SRAM_OC changed from 0x20000 to 0x10000 and SRAM_ITC size changed from 0x10000 to 0x20000. So 0x10000KB is moved from SRAM_OC to SRAM_ITC.

(Later note:I think an error here is that BOARD_SDRAM and NCACHE:REGION should be placed last, so that SRAM_DTC is the first RAM block.)
What am I missing - is there someting else I need to do? (all breakpoints have been removed)
In the editor all that is required is to change the memory block sizes by portions of 32KB - no other fields?
What purpose does the checkbox "Preserve memory configuration" have?