LT Security LTN8600 Series NVR (V2.3.2) - Manual (Page 46)

User Manual of 9600/8600/7700/7600 Series NVR
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Figure 3. 3 Digital Zoom
Image Settings icon can be selected to enter the Image Settings menu.
Figure 3. 4 Image Settings- Preset
You can also choose the Customize mode to set the image parameters like brightness, contrast, saturation and hue.
Figure 3. 5 Image Settings- Customize
Live View Strategy can be selected to set strategy, including Real-time, Balanced, Fluency.