I want to create a custom master page for my site collection. So I am planning to do the following steps:-
- Using sharepoint designer, to copy exsisitng seatle.master page, and then paste it.
- Rename the new copy to “Custom.master”.
- Open the “Custom.master”, add my modifications.
- Save, then right click and chose "set as default master page".
I read some articles which use different approaches. So I have these two questions:-
Are my above steps valid, and will I lose my modification in case I did an upgrade or other processes?
Is modifying the .master file the right approach or I should modify the HTML file instead?