Presumably:
Lua Code:
/run if ChatConfigOtherSettingsSystemCheckBox1Check:GetChecked() then ChatConfigOtherSettingsSystemCheckBox1Check:Click() else print("Already OFF!") end
and:
Lua Code:
/run if not ChatConfigOtherSettingsSystemCheckBox1Check:GetChecked() then ChatConfigOtherSettingsSystemCheckBox1Check:Click() else print("Already ON!") end