When making a bar chart in Dashboards, the axis titles typically behave the way you would expect, where the y-axis title reads vertically, and the x-axis title reads horizontally. But when you change the chart orientation to horizontal rather than the stock setting of vertical, the x-axis title now also reads vertically, which has quite the awkward appearance. There is currently no setting to switch it from this to back to horizontal, and having this as a setting would help for full customization.
