Can the values of visualization.json be changed to increase the displayed values font on a Bar Chart

[dthornburg]

The font size of the values in a bar chart are too small. Can the below values in the visualization.json file be changed to increase the font for 1 bar Chart? If so; how

"},"showValues":true,"dimensionAxis":{}},{"calculationCondition":"","dimensions":[{"dimension":{"dtype":"DimensionContainerString","value":"DI10"}

Json values for chart:

,"title":"Yearly Summary","type":"barchart","subtitle":"","orientation":"Vertical","grouping":"Grouped","legend":{"dock":"Right","showTitle":true},"measureAxis":{"max":"","min":"","show":"Left"},"showValues":true,"dimensionAxis":{}},{"calculationCondition":"","dimensions":[{"dimension":{"dtype":"DimensionContainerString","value":"DI10"},"sort":{"SortAlphabetically":"Ascending","SortNumerically":"Ascending","SortByExpression":"Ascending","Expression":""},"suppressNull":false,"showTotalSum":false,"showTotalString":""},{"dimension":{"dtype":"DimensionContainerString","value":"DI18"},"sort":{"SortAlphabetically":"Ascending","SortNumerically":"Ascending","SortByExpression":"Ascending","Expression":""},"suppressNull":false,"showTotalSum":false,"showTotalString":""}],"id":"CH37","measures":[{"measure":{"dtype":"MeasureContainerString","value":"ME1"},"series":{"type":"line","axis":0}}],