SharePoint: How to change the default home page

I am going to explain using SharePoint 2013
1.Using SharePoint Designer
Open SharePoint Designer
Open your site
Click on All files.
You will find Default.aspx. Which is Default page for SharePoint.
If you want to change the default page, first create new page.
Don't create new page in All files root folder.
Go to Site Assets or Page
Create new page.
Right click on page.
You will "Set as HomePage"
Save
Done
2. Using Welcome page option in SharePoint UI
Open SharePoint site in browser
-First make sure -Publishing features are enabled
Now Click on Site Settings
Under Look and Feel
Click on Welcome Page
Now you can change to different page.
3.Using Power Shell
4.Using Code.