I want to publish my custom masterpage. I clicked Site Settings but Design Manager doesn't appear under menu of "Look and Feel". How can I do appear this option?
These features need to be activated to get the Design Manager in SharePoint.
- SharePoint Server Publishing Infrastructure (site collection level)
- SharePoint Server Publishing (site level)
Even after activating these two features, if the design manager doesn't appear, just deactivate and re-activate them once again, that will solve the issue.
This link describes the steps