Issue with roll-over image

Hi,

I am facing this issues with Captivate 9 when importing an image for a roll-over. 

• I am importing an image (that includes a text box created in snagIT) as a roll-over image. I was using a font of arial 18 in captivate, but when I imported a text box with font size 18, the font was appearing rather too big, although the font size is the same. Not sure why.
• And faced the same issue with a text box created in ppt too. When I imported the text box, for some reason, it was getting imported at a huge size. And same is the issue with font size. The font size in ppt is appearing rather too big.

Is there any way how I can match the font size I had created in Captivate. Let me know if I am missing something.