PowerPoint supports font sizes from 1 to 3600 points in increments of 0.1, so a size of exactly 1 pt is valid. The behavior described (showing “1+” and jumping to 32) usually indicates that PowerPoint is interpreting the input as invalid and reverting to a default size.
To reliably set the font size to 1 pt in PowerPoint:
- Select the text placeholder or specific text that should be 1 pt.
- On the Home tab, locate the Font Size box.
- Click in the Font Size box, type
1 (just the number), and press Enter.
- Confirm that the box now shows
1.0 or 1 and that the text appears extremely small.
If the box still shows “1+” or jumps to a larger value, try:
- Typing
1.0 instead of 1 and pressing Enter.
- Reducing the font in steps using Decrease Font Size until it is very small, then typing
1 again.
- Testing in a new blank presentation to rule out corruption in the current file.
If none of these work, use the smallest size PowerPoint will accept (for example, 2 or 3 pt) as a practical minimum, since the application may be enforcing an internal lower limit in that environment.
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