Hi. By default theme you mean the previous Figma interface (UI2)? If so, there is no way to go back to it, UI2 was removed from Figma about a month ago. Everyone has only UI3 now.
Yeah I realize that. I was trying to suggest it as a feature so they would add back the previous theme a a ‘default’ as the color/theme was better than both the light and dark versions they have now. I would love to have the UI back as well but I’m just requesting the same colors used previously. The white canvas is way too bright and the dark canvas is way to dark. The previous version was perfect for the eyes.