how to change font size and line color of chart(html5) in app designer ?

It's been a while since I did this but I think the font and colors can be manipulated in the advanced settings for the chart. See this post: http://community.rapidminer.com/t5/RapidMiner-Server/LABELS-CHARTS/m-p/37265

Maybe @Edin_Klapic can chime here too. 

Hi dkpengqiuyang,

The font size for the Data labels can be changed in the HighCharts Expert settings (see screenshot).

The string to enter would be

{plotOptions: {series: {dataLabels: {style: {fontSize: '20px'}}}}}

The colors are defined by the Style bundle and applied in the order the attributes are listed in the Publish to App object.

Maybe a workaround would be to simply reorder the attributes so Ok appears in green?

Best regards,

Edin

You can of course format the font size for the xaxis as well.

The syntax is:

{xAxis: {labels: {style: {fontSize: '20px'}}}}

Together with the data labels your entry would be:

{plotOptions: {series: {dataLabels: {style: {fontSize: '20px'}}}},xAxis: {labels: {style: {fontSize: '20px'}}}}

Best,

Edin