Arduino IDE search all of sketch

I have been working with Marlin 1.1.7-1.1.9 for a few months. I am looking into 2.0.x and find that only 3 files are shown in the IDE now. That means that search does not go across all the source files even when the all sketch option in the search dialog is selected. Is there another option that I do not know about for searching all source? Is there a way to go back to all sources being tabed?

Thanks
Robert Duncan

marlin 2 is designed for Platform IO (A much better IDE)

[marlinfw.org]

You have all other files in src folder under marlin...