Control saturation

Increasing saturation is a simple technique that can be refined to focus on individual colour channels so the effect is applied only to specific colours, which is exactly what we’ll do here. To get started, create a Hue/Saturation Adjustment Layer; when the dialog box opens, click on the dropdown menu that’s set to Master and select Yellows. Now simply drag the Saturation slider right to +30 to boost the green moss.