There are a few different ways to do this depending on your membership type.

With the Basic service:

• First create a chart with the settings you want to keep.
• Then, scroll to the ChartList Actions Box located below the chart and click the "Apply Style to All" link.
• You will be asked to confirm the changes in several pop-up questions, please read each question carefully and select the correct answer.

With the Extra and PRO service:

• First select which list you want to change from Your Favorites.
• Next, select a chart from that list and adjust it to the settings you want to keep. If there is already a chart in your list with the settings you want, choose that chart instead.
• Then, scroll to the ChartList Actions Box located below the chart and click the "Apply Style to All" link. 
• You will be asked to confirm the changes in several pop-up questions, please read each question carefully and select the correct answer.