Open the PowerPoint file you'd like to save as a template and make any changes to the slides that you need to. Click on the "File" menu when you are satisfied with the presentation's appearance.

The easiest and quickest method to make a roadmap is to use a pre-designed template available from Microsoft. You can find some roadmap templates in the PowerPoint’s online library that you can import ...

It's often useful to have a consistent visual theme throughout a PowerPoint presentation. A consistent theme not only helps your audience to absorb the information, but it also lets you focus on your ...

VisualBee not only offers free PowerPoint templates, it can automatically design your presentations for you. One last resource: Slidevana provides over 150 truly beautiful slide templates.

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, ...