Is there a link for all shotcut filters?

[Elusien]

No, not for all of them. See here:

Applying a filter to filter or combining filters?

Is there a system for using filters in combination? Specifically I wanted to use Crop:Circle and Size and Position together. In this case instead of the closing to the center I wanted it to close onto a person head. Also is there a list of what all the filters do? Some are obvious, but as someone relatively new to video editing many are a complete mystery to me.