select any theme with colours M-x linum-mode customize-variable linum-format to %05d config to truncate long lines Go to the end of a truncated line. The limun buffer disappears and is replaced by blanks. IMHO, the linum buffer should no change
In GNU Emacs 27.1.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20) of 2020-09-26 built on paag-EliteBook Repository revision: cc7f9714858ab9f1fc30ffcfc5acc018da2b5d4d Repository branch: emacs-27 Windowing system distributor 'The X.Org Foundation', version 11.0.12008000 System Description: Ubuntu 20.04.1 LTS
Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. rules has auto save data; consider M-x recover-this-file
Important settings: value of $LC_MONETARY: es_ES.UTF-8 value of $LC_NUMERIC: es_ES.UTF-8 value of $LC_TIME: es_ES.UTF-8 value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix
Major mode: Info
Minor modes in effect: tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t buffer-read-only: t line-number-mode: t transient-mark-mode: t