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doremi-custom-themes+,doremi-color-themes+(since 2004) -
icicle-custom-theme,icicle-color-theme(since 2006)
Cycling shows everything in your session using each theme, in turn.
doremi-custom-themes+is an interactive Lisp function indoremi-cmd.el.It is bound to
C-x t s.
(doremi-custom-themes+ &optional FLIP)Successively cycle among custom themes.
The themes used for cycling are those in option
doremi-custom-themes.You can use
C-gto quit and cancel changes made so far. Note, however, that some things might not be restored.C-gcan only disable any themes that you applied. It cannot restore other customizations that enabling a theme might have overruled. Note: Having a lot of frames present can slow down this command considerably.Option
doremi-custom-themes-accumulate-flagdetermines whether cycling accumulates themes or disables all themes other than the current one. Note: A non-nil value (accumulating) can considerably slow down cycling.Option
doremi-themes-update-flagdetermines whether the updated value ofdoremi-custom-themesis saved. A prefix arg to this command flips the option value for the current invocation of the command.
https://www.emacswiki.org/emacs/SiteMap#LearningEmacs
That is, just go to Emacs Wiki. The very first heading after How to use this site is Learning About Emacs.
There you'll find lots of suggestions from Emacs users, new and veteran (including probably all or most suggestions you'll find here). Anyone can add their suggestions there (like here, but all in a single place).