You can manually create a custom Gantt chart from scratch using the native Chart menu of PowerPoint. In its Chart menu, you can find several types of standard charts including line, bar, area, pie ...

President Obama was shown PowerPoint slides, mostly maps and charts, in the White House Situation Room during the Afghan strategy review last fall.

This flowchart from The Extreme Presentation Method can help you select the best type of chart for the message you want to send.

You can change the default color of chart, graph, treemap, etc. in Word, Excel, and PowerPoint with the helpof these simple steps.