[old_tv_nut]

In terms of user friendliness, the Worthington was reasonable in having separate buttons for the color controls. Zenith's SC-600 remote used the channel up/down buttons as secondary-function tint controls when the sound was muted. This confused some owners to the point that after multiple home service calls, the serviceman would disconnect the tint functions to keep the owner from getting themselves stuck with the tint all the way at one end or the other.