>>>>Double click on the band that says "Detail" (band under the fields themselves).
>>>>
>>>>If 30 works for you, that's great.
>>>
>>>Thanks, Fred. I found, it's about 15. So, I put 16 and it works fine.
>>
>>What font and type measurement are you using? Sounds like millimeters.
>
>Font is Times New Roman 9. I don't know about measurements. How can I check it and change it?
>
>Thanks.

It looks like you're using pixels. While in the Report Designer, choose the Format menu, Set Grid Scale... dialog. It's either System setting (windows English/Metric) or Pixels for the ruler and the info shown at the bottom if you have the View menu, Show Position option turned on.