How do I make the "New Tab" page set as my homepage in Opera?

Solution 1:

If I understood your question correctly, you want Speed Dial (the page that appears when you open up a "New Tab") as your homepage.

If this is the case, go to Preferences (Ctrl-F12) > General > Startup > Start with Speed Dial. Otherwise, there are other Startup or homepage settings that you might prefer (Show start-up dialog, Start with home page, etc.)

Solution 2:

Opera browser is originally configured to show the "speed dial" tab as the default home page.If you clicked on "new tab" which is symbolized by (+) sign you will get the same "speed dial" tab and it will not give you a blank tab.So you can configure the home page or the action of starting the program in Opera by clicking on Menu>Settings>preferences and choose the best option you like.