How to apply my custom master page as a Site Master Page?

Question

I have created my custom master page and sone following steps but my master page isn't applied to the site.

1. Go to your SharePoint site www.mysite.sharepoint.com/sites/xyz.
2. Click on the gear icon in the top-right corner and select "Site Settings."
3. Under "Look and Feel," click on "Master Page."
4. In the "Site Master Page" section, select "Specify a master page to be used by this site and all sites that inherit from it."
5. In the "Site Master Page" field, enter the URL to your custom master page (e.g., /sites/xyz/_catalogs/masterpage/YourCustomMasterPageName.master).
6. In the "System Master Page" section, select "Specify a master page to be used by this site and all sites that inherit from it."
7. In the "System Master Page" field, enter the URL to your custom system master page (e.g., /sites/xyz/_catalogs/masterpage/YourCustomSystemMasterPageName.master).
8. Click "OK" to save your changes. Note:- its applied as System Master Page but not applying as a Site master Page

Answer 1

Hi @Moheed Gillani

Site Master Page is a custom master page and applies to all Publishing Pages and System Master Page is a default master page and applies to all pages including view pages, forms and web part pages. So you will need to create a publishing portal site collection to apply your Site Master Page.

1. Go to SharePoint central administration site.
2. Create new publishing portal site collection.

And you can check the following steps tp create a Master Page

https://www.c-sharpcorner.com/article/steps-to-create-custom-master-page-in-sharepoint-2013-using-design-manager/

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