Defining the size of the images of the items

Hello

Firstly apologies, for I am not fluent in Spanish and English, and I have to translate everything with google trasladate for you to understand. I hope the translation is correct and that is understood.

I recently installed Joomla News II 2.5, and have migrated all items, with images of the previous version of Joomla 1.5 to 2.5, while I changed the template to JATelineIII for The News II.

The problem I have is that all pictures come to life-size in both articles, as in the families and others. And being as they are over 1000 images that need resizing, my questions are:

1. - How I can indicate the size of the images so that all are kept to be determined?
2. - How I can make out smaller than actual size, and expands when clicked?

At the moment, not knowing the result of translation from Spanish into English, is all.

Thank you very much for your attention.

Hi.
Could you paste url to your site?

Hi.
Could you paste url to your site?

Hi

I am currently working locally. I have not yet uploaded to the web hosting. When you have it, and I will show you the direction, and the problem.

Thank you very much for your attention.