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).

• doremi-custom-themes+, doremi-color-themes+ (since 2004)

  https://www.emacswiki.org/emacs/DoReMi

• icicle-custom-theme, icicle-color-theme (since 2006)

  https://www.emacswiki.org/emacs/Icicles

Cycling shows everything in your session using each theme, in turn.

doremi-custom-themes+ is an interactive Lisp function in doremi-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-g to quit and cancel changes made so far. Note, however, that some things might not be restored. C-g can 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-flag determines 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-flag determines whether the updated value of doremi-custom-themes is saved. A prefix arg to this command flips the option value for the current invocation of the command.

any IDE is just as extensible by using Plug Ins

Lisp. Up, down, around, inside, across, between, under, at, through, into.

Good to see strokes being uninterred.

Wrt customizable context menus and other mouse-3 actions, see also Mouse3 (mouse3.el).

https://stackoverflow.com/q/77540230/729907

These might help:

• Highlight Dynamic Variables (dyna-show.el)
• Highlight Defined Lisp (hl-defined.el)

See (elisp) Excursions

https://emacs.stackexchange.com/q/79537/105

Also very basic, IMO:

• g X - go to buffer X’s point
• j - jump to diff number (prefix arg)
• ! - update (re-diff)
• C-l - recenter
• * - refine current region
• ## - ignore whitespace diffs

https://www.emacswiki.org/emacs/LearnEmacsLisp

See:

• Alteration of List Structure
• Modifying Lists

As /u/mickeyp said, Imenu should do what you want. That presumes that LaTeX mode in Emacs has set up Imenu in a useful way for what you want. If it doesn’t, you can do that yourself - define Imenu’s menus for the mode you’re using (e.g. LaTeX), to recognize the section headers you want, etc.

FWIW, setting something to #f in Emacs Lisp means you’re setting it to TRUE, not FALSE. Elisp is not Scheme.

https://emacs.stackexchange.com/q/79470/105

Learn Emacs Lisp on Emacs Wiki.

Do you see the problem when you start Emacs with emacs -Q?

Check your value of option default-frame-alist…

Is there a easy way to use emacs ?

Yes. Start it and type C-h t. Follow the simple tutorial directions.

https://emacs.stackexchange.com/q/79303/105

A couple of the Isearch+ features that let you limit the search space/context.

1. You can limit isearching to the text in the region. Controlled by a user option, and can be toggled with C-x n during Isearch. Works also for a noncontiguous region, such as a rectangle.

2. You can switch any time to isearching outside, instead of inside, the region.

3. You can search within/without the zones of text defined by the lazy-highlight matches of a previous search.

Or search within/without the zones of text that have a certain text property or set of properties (optionally considering their values) – any properties.

4. Dynamic Isearch filtering: add/remove any number of search filters while isearching.

• Isearch+

• Dynamic Isearch Filtering

+1.

• +1 for the Abelson & Sussman lecture(s).

• Plus links at Emacs Wiki Learn Emacs Lisp