Without installing the plugin, you can easily add the code to connect to Google Analytics in the Theme Options.
Path is  Theme Options > General > Custom Codes > Before closing </head>

Also, Js and CSS codes can be added in the special fields of the section.

In the following example you can see how to add content or PHP codes after posts meta in archive pages.

Best solution is to add custom actions and filters in Child Theme functions.php file. But also you can create your own plugin and use this codes in your plugin.

In the following example you can see how to add content or PHP codes before posts meta in archive pages.

Best solution is to add custom actions and filters in Child Theme functions.php file. But also you can create your own plugin and use this codes in your plugin.

In the following example you can see how to add content or PHP codes before any posts meta in single post page.

Best solution is to add custom actions and filters in Child Theme functions.php file. But also you can create your own plugin and use this codes in your plugin.

To change all posts date and time format, Go to Dashboard > Settings > General and find Date and Time Format settings.

• Custom Format  – In official PHP website you can find out all the date and time formats, Click here, Or by searching in google you can find date formats.

In the following example you can see how to change page layout to left.

Best solution is to add custom actions and filters in Child Theme functions.php file. But also you can create your own plugin and use this codes in your plugin.

In the below screenshot, you can see how to find hide header page meta key. First edit your page in backend then find your option and then open your browser inspect element feature to find the input name or data-depent-id attribute. Exactly like below shot you can find key. For hide header key is hide_header