title | Page or blog post title

subtitle | Short description of page or blog post that goes under the title

tags | List of tags to categorize the post. Separate the tags with commas and place them inside square brackets. Example: `[personal, self help, finance]`

comments | If you want do add comments to a specific page, use `comments: true`. Comments are automatically enabled on blog posts; to turn comments off for a specific post, use `comments: false`. Comments only work if you enable at least one provider(Facebook, disqus, staticman) in `_config.yml` file.

show-avatar | If you have an avatar configured in the `_config.yml` but you want to turn it off on a specific page, use `show-avatar: false`. If you want to turn it off by default, locate the line `show-avatar: true` in the file `_config.yml` and change the `true` to `false`; then you can selectively turn it on in specific pages using `show-avatar: true`.

image | If you want to add a personalized image to your blog post that will show up next to the post's excerpt and on the post itself, use `image: /path/to/img`.

The default style of Beautiful Jekyll is to feature the blog feed on the front page. But for many sites that's not the ideal structure, and you may want to have a separate dedicated page for the blog posts. To have the blog hosted on a different URL (for example at `<mysite.com>/blog`), copy the `index.html` file into a folder with the same name as the desired page (for example, to `blog/index.html`), and in the `_config.yml` file you need to add a parameter `paginate_path: "/<page name>/page:num/"` (for example `paginate_path: "/blog/page:num/"`).

Unfortunately, this is a no-answer! There isn't a one-size-fits-all solution to this, because every person will view your site on a different browser with different dimensions. Some browsers will have very wide aspect ratio, some will be narrower, some will be vertical (such as phones), different phones have different screens, etc. The image will always be centered, so the only tip I can give is that you should make sure the important part of the image is in the middle so that it'll always show. Other than that, every browser will show a different clipping of the image.