adding multiple time frames to parameter selection?

I have searched site and having a hard time finding a way to add multiple time frame (parameter selection)

I'm wanting to optimize a selection of time frames for an ea 

kc8yty559:

I have searched site and having a hard time finding a way to add multiple time frame (parameter selection)

I'm wanting to optimize a selection of time frames for an ea 

//--- inputs
input ENUM_TIMEFRAMES InpTimeFrame=PERIOD_H4;      // Indicator chart period, default H4