There used to be a collection of templates from a lot of users. I had put a number of my templates there. It was not well organized but there were over a 100 templates there.
It apparently no longer exists that I can see. Probably when they "updated" the website. They are saved as .xml files and can be exported from the template box. You can modify templates in a sub screen to the template screen to meet your needs.
Theoretically you open the template box (control T from one of the categories) and there is a section that states Import a template (from AC or from Local Folder). If you click on that folder it should take you to the webpage but it takes to the generic "front door" of the AC website. I googled amazing charts templates and no luck either.
Sure you can combine templates. I have several different types of templates. Some are most of the text I would ordinarily type. Some are reminders to check various items (do you remember all of the cranial nerve checks?) Most of my notes include free form and templates, and yes, sometimes more than one template which then I would modify to meet needs. Even in Pediatrics we frequently have multiple medical problems addressed at the same visit, this makes it easier.
To make a template you use the alt button and the Right click button on your mouse. It will then copy all of the text box into the template field, which then you need to label the template. You can add / subtract / change the information in the template box to be more generic for future visits. When you write that perfect note for a type of visit, this keeps it easy to repeat.
