Simple change on WordPress theme

Hello guys, how are you?
I have a medical Arabic website, but I want to make a simple change, which makes my font is Bold.

see: my fonts:



1- But I want like this:
http://s33.postimg.org/5nvdhmryn/image.jpg

see one of my posts:
http://pharmacy.qu-medical.com/g/%D8%AC%D9%86%D8%AA%D8%A7%D9%85%D9%8A%D8%B3%D9%8A%D9%86-gentamicin.html

I am using Customizr WordPress theme

2- I want too make the H2 smaller

 

The modify whatever css you have for the container, and set font-weight: bold;
As for the h2, find its entry in the css file and make it smaller (reduce the number in the font-size line).

 

Share a link to the page where you have the above live and we'll be able to give you the required CSS here.

 

Very simple to change and PoPSiCle hit the nail right on the head.

 

Try to find out from the theme you'are currently sing as sometime certain WP theme provide the tools there.. OR check out the CSS and modify as you need.