Determines whether or not a text link citing the data source is placed at the bottom-right cored of the figure. Has only an effect only on graphs that have been generated via forked graphs from the Chart Studio Cloud (at https://chart-studio.plotly.com or on-premise).

Sets the default distance (in pixels) to look for data to add hover labels (-1 means no cutoff, 0 means no looking for data). This is only a real distance for hovering on point-like objects, like scatter points. For area-like objects (bars, scatter fills, etc) hovering is on inside the area and off outside, but these objects will not supersede hover on point-like objects in case of conflict.

Sets the horizontal alignment of the text content within hover label box. Has an effect only if the hover label text spans more two or more lines

Sets the background color of all hover labels on graph

Sets the border color of all hover labels on graph.

Sets the default hover label font used by all traces on the graph.

Sets the font for group titles in hover (unified modes). Defaults to `hoverlabel.font`.

Sets the default length (in number of characters) of the trace name in the hover labels for all traces. -1 shows the whole name regardless of length. 0-3 shows the first 0-3 characters, and an integer >3 will show the whole name if it is less than that many characters, but if it is longer, will truncate to `namelength - 3` characters and add an ellipsis.

Determines the mode of hover interactions. If *closest*, a single hoverlabel will appear for the *closest* point within the `hoverdistance`. If *x* (or *y*), multiple hoverlabels will appear for multiple points at the *closest* x- (or y-) coordinate within the `hoverdistance`, with the caveat that no more than one hoverlabel will appear per trace. If *x unified* (or *y unified*), a single hoverlabel will appear multiple points at the closest x- (or y-) coordinate within the `hoverdistance` with the caveat that no more than one hoverlabel will appear per trace. In this mode, spikelines are enabled by default perpendicular to the specified axis. If false, hover interactions are disabled.