emacs 24: save theme permanently after choosing it
 

Hi. Under Emacs 24 I figured out that I could select a pre-designed color theme with M-x load-theme. But what do I do to make that theme automatically activate on start up?

In Emacs 24, instead of using load-theme try M-x customize-theme. Then just check the theme you want, accept the various warnings, and save the customize buffer.

If your theme gets updated, you have to do this again, as a security measure.

Thanks, that worked. Since you seem knowledgeable: Is it difficult to tweak some part of your current theme (say, the background color) and then save the changes? (Especially, without having to mess around with the .emacs file yourself.)

As far as I know, no; you have to probably edit the theme files yourself. Don't fear editing your .emacs, that's just part of using emacs.