I want to change the optimization level for only one function in a file. Is it possible?

Question

I am using CC-RX Compiler (IDE: CS+, MPU: RX64M). 
 I want to change the optimization level for only one function in a file. Is it possible? 
 I remember that it was possible in the old Hew Compiler because of the "#pragma option speed" keyword. However, 
 it seems that CS+ can only set the level on a per-file basis. If you know how, please help me.

PV_Renesas · Answer

Hello, Indeed, #pragma option directive is no longer available. An alternative would be to change the Optimization settings per-file. Open Property of the desired file and change the Set Individual Compile Option to YES Then, you can modify the Optimization settings for this file. Thank you, Panos