The tools will not allow me to change from NewLibNano to NewLib

[RogerDavisWork]

I tried to follow the instruction in the NXP document "How to Switch C/C++ Library in MCUXpresso IDE" where I change the library setting in both "MCU C Compiler Miscellaneous" and in MCU Assembler Architecture & Headers", but the last step says to  go to "MCU Linker Managed Linker Script and change it there, but the selection has "NewLibNano" and its grayed out, not letting me change it.  Then when I try to compile it changes all of them back to NewLibNano.
I am using MCUXpresso IDE v11.8.0.

[ZhangJennie]

Hi RogerDavisWork 

I tested both of the two methods mentioned in the article. I didn't see any problem. See my attached video.

Could you check my video and try again?

If still fail on your side, Could you let me know how to reproduce your problem?

Have a nice day,

Jun Zhang