The new command
tab-bar-mode enables the tab bar at the top of each
frame (including TTY frames), where you can use tabs to switch between
named persistent window configurations.
The 'C-x t' sequence is the new prefix key for tab-related commands:
'C-x t 2' creates a new tab; 'C-x t 0' deletes the current tab;
'C-x t b' switches to buffer in another tab; 'C-x t f' and 'C-x t C-f'
edit file in another tab; and
S-C-TAB switch to the next
or previous tab. You can also switch between tabs and create/delete
tabs with a mouse.
Tab-related commands are available even when
disabled: by default, they enable
tab-bar-mode in that case.
The X resource "tabBar", class "TabBar" enables the tab bar when its value is "on", "yes" or "1".
The user option tab-bar-position specifies where to show the tab bar.
Tab-related commands can be used even without the tab bar when
tab-bar-mode is disabled by a nil value of the user option
tab-bar-show. Without the tab bar you can switch between tabs
using completion on tab names, or using
Read the new Info node "(emacs) Tab Bars" for full description of all related features.
The new command
global-tab-line-mode enables the tab line above each
window, which you can use to switch buffers in the window. Selecting
the previous window-local tab is the same as typing 'C-x <LEFT>'
previous-buffer), selecting the next tab is the same as 'C-x <RIGHT>'
next-buffer). Both commands support a numeric prefix argument as
a repeat count. Clicking on the plus icon adds a new buffer to the
window-local tab line of buffers. Using the mouse wheel on the tab
line scrolls tabs.
Read the new Info node "(emacs) Tab Line" for full description of all related features.
This feature uses Tramp and works only on systems which support GVFS, i.e. GNU/Linux, roughly spoken. See the node "(tramp) Archive file names" in the Tramp manual for full documentation of these facilities.
jsonrpc library enables writing Emacs Lisp applications that
rely on this protocol. Since the protocol is designed to be
transport-agnostic, the library provides an API to implement new
transport strategies as well as a separate API to use them. A
transport implementation for process-based communication, such as is
used by the Language Server Protocol (LSP), is readily available.
Backtrace mode adds pretty printing, fontification and ellipsis expansion to backtrace buffers produced by the Lisp debugger, Edebug and ERT. See the node "(elisp) Backtraces" in the Elisp manual for documentation of the new mode and its commands.
global-so-long-mode has been enabled, visiting a file with very
long lines will (subject to configuration) cause the user's preferred
so-long-action to be automatically invoked (by default, the buffer's
major mode is replaced by
so-long-mode). In extreme cases this can
prevent delays of several minutes, and make Emacs responsive almost
immediately. Type 'M-x so-long-commentary' for full documentation.