Sharon,
Let me see if I can help you:
Widgets:
You can add this snippet to your “Custom CSS” box in the theme options page. That should make your image fit a bit better:
img {
max-width: 100%;
height: auto;
}
Page Titles:
Personally, I use a plugin called WordPress SEO by Yoast for my page titles/descriptions. To use it, you’ll want to go to “Plugins” in your WordPress control panel and select “Add New” and then search for it. Once you’ve installed it, you’ll also want to disable the built-in SEO in the theme options page too.
The plugin will give you a page title/description box on every page/post where you can specify those items exactly.
Header Image:
It looks like the “Custom CSS” is still pointing to a JPG file instead of the PNG one. Here’s the code that’s on your site now:
#header {
background-image: url(https://hassuka.co.il/wp-content/uploads/2011/08/logo-300x111.jpg);
}
If you change the image path there, that should take care of it for you.
Font Size:
You can change the font size of just about every content element this way. Add this to your “Custom CSS” box:
p, li { font-size: 16px; }
and update your settings. That will increase the font size by 2 pixels. Feel free to adjust the 16px to get the appearance you’re looking for.