FreePDF: Changing the Font size is possible in FreePDF only for newly inserted text boxes.
Change the font size of text on the ribbon tab Home | group Character.
Proceed as follows:
| 1. | Select the Text edit tool  in the Quick access toolbar and select the text whose font size you want to change. |
| Alternatively, use the Object tool  to click on the text box that you want to edit. |
| 2. | Click on the small arrow to the right of the Font size (marked in red here). |
| 3. | Set the desired font size: |
| The dropdown list offers the most common font sizes, which you can select via a mouse click. However, you can manually enter other values in the field at any time. |
| Tip: The icons  in the group Character can be used to increase or decrease the font size by one level. |
