Schematic questions Core Board V2 (aka DevKitC)

[cro_ghost_rider]

Hello everybody

I have two questions to the Core Board V2 (aka DevKitC) Schematic. Here the link to the Schematic.
Why are the resistors R7, R15, R19, R20, R25 and the capacitor C23 green?
And what does (NC) behind the values mean?

Regards

[ESP_Angus]

No Component, ie there's a footprint on the Core Board PCB for this part but there's no component placed there by default.

Other schematics sometimes use the convention NP (no placement) or DNP (do not place).

(Designers sometimes use NC/DNP footprints to support part substitutions, or to allow for modifications to the design during testing without having to respin the PCB.)