Hi there,
To know how to use the combination you need to check the hierarchy in the Google Chrome Developer toolbar:
If the class are in one tag such as:
<h1 class="x-headline your-custom-class"> ...
To target the h1
you will need to use this selector:
h1.x-headline.your-custom-class {}
But if the generated HTML code has additional wrappers which is some cases is necessary to render proper view such as:
<div class="x-headline your-custom-class">
<h1>Helllo!</h1>
</div>
Then you need to add space between the selectors:
.x-headline.your-custom-class h1 {}
If that is not what you meant you need to be more descriptive and ask detailed question and case to be able to help you.
The reason we ask to open up new threads when you have additional questions is to be able to help you better and quicker. If the thread gets longer like this one, each support staff will need to read from top to bottom to be able to know the case and get familiar with the situation to only understand that for example the original request was handled and there are other sections of the website that you are talking about now.
There is no limitation when it comes to number of the threads that you can open up and feel free to do that and keep each question separated.
Thank you for your understanding and cooperation.