The input range of a channel determines how large signals can be measured. The input range is defined as full scale value, the highest voltage that can be measured, both in positive as in negative direction. When the input range is e.g. 8 V, signal values between -8 V and +8 V can be measured. Values outside that range will be clipped.
For oscilloscopes, another way of defining the input range is also used, in V/div. This is the full scale input range divided by the number of grid divisions that are used to display that range. A typical oscilloscope display has 8 division vertically, covering -full scale to +full scale. A full scale input range of e.g. 8 V equals 2 V/div.
Changing the input range of a channel in the Multi Channel software can be done in various different ways: