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Imenu produces menus for accessing locations in documents, typically in the current buffer. You can access the locations using an ordinary menu ( menu bar or other) or using minibuffer completion. A typical use of Imenu shows a menu-bar menu that is an index or table of contents for the current buffer.
For alphabetical order, use ‘imenu–sort-by-name’ as the value. The following patch lets the user (final user or major mode developer) control whether the submenus are sorted or kept on top. The guiding idea is that there is two major ways to offer an imenu, according to the mode:
How does Imenu anywhere work with Helm and Ido?
Imenu anywhere with IDO and Helm. imenu-anywhere package provides `imenu-anywhere` command that pops an IDO interface with all the imenu tags across all buffers with the same mode as the current one. This makes it similar to etag selection, but only for the open buffers.
How to add Imenu to the menu bar in Emacs?
See Imenu in the Emacs manual. To automatically add an Imenu menu to the menu bar for a given mode, do something like this: ‘font-lock-mode-hook’ is run after entering a major mode. You can make use of this to add an Imenu index to the menu bar in any mode that supports Imenu:
Icicles command ‘icicle-imenu’ lets you browse the definitions in any set of Imenu-supported buffers, files, or bookmark destinations at the same time. Use it to navigate among Imenu entries anywhere. This screenshot shows ‘icicle-imenu’ finding function definitions that match ‘kill’:
https://www.youtube.com/watch?v=iN-nRckvThw
How does the speed bar work in Windows 10?
Speedbar expands upon “explorer” windows by maintaining context with the user. For example, when using the file view, the current buffer’s file is highlighted. Speedbar also mimics the explorer windows by providing multiple display modes. These modes come in two flavors.