The chart sets chart.ink.enabled, so its point annotations are draggable: grab a labelled marker and move it. Click a note to open its floating editor card: rename it inline, pick an accent color, toggle bold, step the text size, grow/shrink or reshape the marker, or delete the note (Enter commits, Escape closes; the swatches come from chart.ink.noteColors). On release of a drag the new position is converted back to data coordinates and written to annotations.points[].x/y, so the annotation stays glued to that data location on later zoom or resize. Use + Note (the palette, from chart.ink.palette) then click the plot to drop a new labelled note. The x-axis Window band moves (drag its middle) or resizes (drag an edge), and the y-axis Target line drags vertically. Fires annotationDragged / annotationEdited / annotationStyled / annotationCreated / annotationDeleted. With the history (Rewind) feature enabled, Ctrl/Cmd+Z undoes any edit and Shift+Ctrl/Cmd+Z redoes it. Needs the ink feature. (Set draggable:false on a single annotation to pin it.)