A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Thank you for reaching out to the Q&A Forum.
To better understand your situation, could you please send me a sample file via private message? I’ve sent you a private message, please check it at your convenience.
Update (March 10):
According to your detailed description, I would like to summarize the solution: Go to the Chart Design tab > select Change Chart Type > hover over the Line category > if you are using Stacked Line, change it to Line
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.