While still on the left chart, click Design, Add Chart Elements, Legend, Right (this move will push the pie to the left and leave space for the other pie). Drag the legend to the bottom for now. Drag the right chart and move its pie next to the left pie as close as possible. Microsoft Excel gives you a boatload of options for changing the format of color charts. You can change the layout of a chart, then customize that layout to the format you prefer.

Best voice to text program for mac. Took me forever to figure this out but I thought I'd share! Instead of trying to reformat the points using the legend to edit, you need to click a single point of the scatter plot itself. If it is part of a series you should see the rest of the series selected as well. From there, right click and choose the 'format data series' option. Once there, select the paint bucket icon, you have the option to format 'line' or 'marker'.

Once you select marker, you can edit the shape, color, etc. Was rude in a way. Of the series of data points, which will change the legend as well!