How to add Site Templates in Sharepoint 2010 while create NEW sites

It just simple and follow this. Go to Site settings and move to the section "look and feel" as shown in below screen.

If you see, there is a link named "Page layouts and site templates". That is what we needed. Just click on that link.

Now, below is the screen you see, which has the complete list of site templates and page layouts available in the system.

If you see the screen, there are only two templates selected by default. This is the reason why we see only two templates available on the create site page. So, add how many templates you want from the left side. You can do the same with page layouts too. Select all page layouts you needed and save

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