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CCS: Pre-defined symbols in file vs. in project

Other Parts Discussed in Thread: CC2640R2F

Tool/software: Code Composer Studio

I have a project using the CC2640R2F where changing a predefined symbol can let a sample project be run either on TI's launchpad boards or on my own custom board.  Normally I right-click on the project name and go into properties->Build->ARM complier->predefined symbols and then edit the CC2640R2_LAUNCHXL symbol to say ETM_BOARD and this updates which board I want to program to.

However the other day I accidentally right clicked on a filename instead of the project name and changed the symbol there.  I noticed my mistake after trying to build the project and then went back and changed the symbol under the project name's menu like normal, but it seems like now there is a link between the two that has broken.  When I change the predefined symbol at the project level, the symbol at the filename level doesn't change with it like normal and so now I have to remember to go and change the symbol in both locations.

Is there a setting that will restore the linkage between these predefined symbols back to normal?  So that I can change the symbol under the project properties and have it propagate down to each of the files as well.

Thank you