Added

• Add subtitle attribute to layout.title to enable adding subtitles to plots [#7012]
• Introduce "u" and "s" pseudo html tags to add partial underline and strike-through styles to SVG text elements [#7043]
• Add geometric mean functionality and 'geometric mean ascending' + 'geometric mean descending' to category_order on cartesian axes [#6223], with thanks to @acxz and @prabhathc for the contribution!
• Add axis property ticklabelindex for drawing the label for each minor tick n positions away from a major tick, with thanks to @my-tien for the contribution! [#7036]
• Add property ticklabelstandoff and ticklabelshift to cartesian axes to adjust positioning of tick labels, with thanks to @my-tien for the contribution! [#7006]
• Add x0shift, x1shift, y0shift, y1shift to shapes to add control over positioning of shape vertices on (multi-)category axes, with thanks to @my-tien for the contribution! [#7005]

Fixed

• Fix displaying scattergl traces while zooming or panning (regression introduced in 2.26.0) [#7018], with thanks to @eiriklv for the contribution!
• Fix for excessive hoverlabel removal and overlap for plots with both scatter and bar traces [#6954], with thanks to @mbant for the contribution!
• Fix adding cartesian "togglehover" when included in modebar.add [#5879], with thanks to @Sizurka for the contribution!
• Handle zorder between overlaying cartesian subplots [#7032], This feature was anonymously sponsored: thank you to our sponsor!