Changing the font size of selected text is a simple thing to accomplish in Captivate. All you need to do is select a text caption (or highlight some text within a text caption). On the Properties panel, Character group, type the desired font size and press [Enter] on your keyboard.
Have you noticed what's missing on the Character group? It appears that you cannot select a font size from a drop-down menu like you can in most other applications.
But looks can be deceiving. While there isn't a traditional font-size drop-down menu, you can in fact scroll through a list of font sizes.
With a text caption selected, move your mouse pointer over the current font Size on the Properties panel (Character group). Don't click inside the Size field... just move your mouse pointer over the field.
Notice that your mouse pointer becomes a hand-mouse pointer and a horizontal arrow.
With your mouse pointer looking like the image above, drag your mouse right to see larger font sizes; drag your mouse left to see smaller font sizes.
As you drag left or right, the font size will increase or decrease by one point. If you want to use a specific font size, simply stop dragging once the size appears and release the mouse clicker.
Note: The largest font size in Captivate is 720 points; the smallest font size is 1 point.