[Lisa Wilke-Thissen]

Hi,

"Miao" wrote

By default, the size of the caption is 12.
The ideal caption size in my mind is 14,
which is the size of the texts in my article.
Could I set it automatically or should I need
to change the size manually whenever a new caption is set?

you have to modify the Caption style:
http://word.tips.net/T000623_Formatting_Captions.html

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Cheers,
Lisa