To change the style of the graph/chart:
Click into the chart you want to change the style of.
Under the chart name, you can select the new chart style you want (bar, line, area, pie, stacked bar, stacked area, text).
To change the color:
Click into the chart you want to change the color of.
Click on the colored "label" you see at the top of the KPI column.
Select a color from your color palette or type in a color code.
Pro-tip: The “stacked” options only work in charts that have more than 1 KPI.