Hello chie080,
We appreciate you contacting us to inquire about Pro Mode's capabilities.
You may use below step-by-step on how to use Pro Mode in your Samsung Galaxy phone.
Pro mode puts the control in your hands so you get the very photo and video you want. Manually adjust settings such as ISO, shutter speed and exposure levels, express your own style with filters, or adjust the white balance settings to accommodate different lighting conditions. Follow the below guide to learn how to use Pro Mode on your Galaxy phone.
Step 1. Launch the Camera.
Step 2. Swipe to MORE.
Step 3. Select Pro Mode.
Step 4. Tap on the available Camera settings and adjust to suit your preference.
Step 5. To reset your Pro Mode settings, simply tap on Reset icon.
Step 6. Once you have captured your Pro Mode photo, you will be able to view within your Gallery.
ISO: Select an ISO value. This controls camera light sensitivity. Low values are for stationary or brightly lit objects. Higher values are for fast-moving or poorly lit objects. However, higher ISO settings can result in noise in photos or videos.
Aperture & Shutter Speed: Adjust the shutter speed. A slow shutter speed allows more light in, so the photo or video becomes brighter. This is ideal for photos or videos of scenery or photos or videos taken at night. A fast shutter speed allows less light in. This is ideal for capturing photos or videos of fast-moving subjects.
Standard: Adjust colour temperature, Tint, Contrast, Saturation, Highlight and Shadows individually
Manual Focus: Change the focus mode. Drag the adjustment bar towards 
White Balance: Select an appropriate white balance, so images have a true-to-life colour range. You can set the colour temperature.
Exposure: Change the exposure value. This determines how much light the camera’s sensor receives. For low-light situations, use a higher exposure.
https://www.samsung.com/au/support/mobile-devices/using-pro-mode/
