Keysight U1610A - Vertical Controls; Channel Selection for Waveform Display; Figure 3-1 Channel 1 Submenu

3 Using the Oscilloscope
44 Keysight U1610/20A User’s Guide
Vertical Controls
Press to access the vertical channel control menu.
Press / to access the respective channel submenu.
Channel selection for waveform display
You can enable either one channel or two channels simultaneously.
Turn on/off the channel by toggling / .
Figure 3-1 Channel 1 submenu