Rigol DS1204B Programming Manual page 24

RIGOL
Function:
The command decreases the vertical offset of channel 1 evenly.
39. :KEY:CH1_POS_Z
Command Format:
:KEY: CH1_POS_Z
Function:
The command adjusts the vertical offset of channel 1 to zero.
40. :KEY:CH2_VOLT_INC
Command Format:
:KEY:CH2_VOLT_INC
Function:
The command decreases the vertical scale of channel 2.
41. :KEY:CH2_VOLT_DEC
Command Format:
:KEY:CH2_VOLT_DEC
Function:
The command increases the vertical scale of channel 2.
42. :KEY:CH2_VOLT_Z
Command Format:
:KEY:CH2_VOLT_Z
Function:
The command sets the adjustment mode of vertical scale of channel 2 as Fine or
Coarse. The vertical scale steps by 1-2-5 in Coarse; and by equality in Fine.
43. :KEY:CH2_POS_INC
Command Format:
:KEY:CH2_POS_INC
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Programming Guide for DS1000B Series