Open PowerPoint and choose a blank slide
Go to the Insert tab
Select SmartArt
Choose a timeline layout from the Process category
Click OK
Enter your dates and milestones in the text pane
Add or remove timeline items as needed
Use the SmartArt Design tab to change colors and styles
Resize and position the timeline on the slide
Add text boxes for extra details if needed
Insert shapes or icons to highlight key events
Format fonts, colors, and alignment for clarity
Save your presentation