Rather new to Magento. I'm looking for Magento 2 core... I found some modules at /vendor/magento/ is this the extent of core?
Also, the reason I was looking for core was I was trying to figure out where the default "Use system value" comes from. I was looking specifically for Shipping Method default values and where they are set.
I found /vendor/magento/module-shipping/etc/adminhtml/system.xml which is the Shipping Settings form. At the bottom it has a line <resource>Magento_Shipping::carriers</resource> which I suspect is the Shipping Methods form. Where does this point?
Thanks in advance for your help!!
Yes, your are right core in Magento 2.x is inside vendor/magento. magento directory contains all its core module.
If you want to create your own custom module then you have to create the directory structure like this.