
Photoshop
In
Photoshop, you can view both grayscale and RGB images simultaneously by using layers and adjustment layers. You can create a grayscale layer or adjustment layer on top of an RGB image, allowing you to see the color image beneath while applying grayscale effects. Additionally, you can use the "Channels" panel to toggle between color channels and view them in grayscale. This feature is useful for comparing tonal values and color information side by side.