The channels one link group links on, named as LinkOptions names them, so a group's flags open as a LinkGroup without translation. The first four have been written since the first release and stay required; the rest are optional, and absent reads as the engine's default (off, and 'nearest').

interface WorkspaceLinkChannels {
    appearance?: boolean;
    chartType?: boolean;
    crosshair: boolean;
    drawings?: boolean;
    interval: boolean;
    symbol: boolean;
    viewport: boolean;
    whenMissing?: LinkMissingPolicy;
}

Hierarchy (View Summary)

Properties

appearance?: boolean
chartType?: boolean

The chart type (candles, bars, a line) follows.

crosshair: boolean
drawings?: boolean

Drawings are shared between the group's charts on the same instrument.

interval: boolean
symbol: boolean
viewport: boolean
whenMissing?: LinkMissingPolicy

What a follower does with an instant it has no bar for.