(tips) How to display "delta" symbol with Windows font

nobiot · July 9, 2020, 9:48pm

Recently, Jethro added delta symbols to the message you see when you launch Org-roam, or manually run org-roam-db-build-cache command.

You might have seen this – the delta symbol is not correctly displayed on some (Windows supplied) fonts, such as Consolas.

Here is how you can fix it:

github.com

nobiot/Zero-to-Emacs-and-Org-roam/blob/master/automatic-installation/.emacs.d/init.el#L27


;;; Let's also assign C-z to undo here
(global-set-key (kbd "C-z") 'undo) ;Emacs default is bound to hide Emacs.

;; Font
;;; If you want to know how to correct specify a font in Windows,
;;; invoke `eval-last-sexp' for (w32-select-font)
(set-face-attribute 'variable-pitch nil :font "Arial-11")
(set-face-attribute 'fixed-pitch nil :font "Consolas-11")
(set-face-attribute 'default nil :font "Consolas-11")
(set-fontset-font nil 'symbol (font-spec :family "Segoe UI Symbol" :size 11.0))
(add-hook 'text-mode-hook 'variable-pitch-mode)

;; Set theme
;;; (Optional) Setting `custom-safe-themes' to t.
;;; This prevents Emacs from asking if it is safe to load the theme.
(setq custom-safe-themes t)

;;; Automatically load the theme you like
;;; I am using Modus Operandi (light theme) here
;;; There is also modus-vivendi (dark theme)
(load-theme 'modus-operandi)

Add this after you set up your main (`default) font. This line instructs Emacs to use the Comabria Math font (I hope it is standard with Windows) only for the delta symbol (defined at code point 120491), and keep the rest presented by the default font.

nobiot · July 13, 2020, 5:26pm

Just quickly updating this.

@zaeph recently updated Org-roam with this. Thank you for the quick change Zaeph; I didn’t think it was worth reporting as an issue (I even thought it might have been very minor with Windows fonts).

You can delete the line 27 that defines Cambria Math.
This previous line will be used to specify the font (Segoe UI Symbol). You can even remove it because Consolas can display the new delta symbol (I want to keep Segoe UI Symbol for other symbols though).

github.com

nobiot/Zero-to-Emacs-and-Org-roam/blob/master/automatic-installation/.emacs.d/init.el#L26



;;; Let's also assign C-z to undo here
(global-set-key (kbd "C-z") 'undo) ;Emacs default is bound to hide Emacs.

;; Font
;;; If you want to know how to correct specify a font in Windows,
;;; invoke `eval-last-sexp' for (w32-select-font)
(set-face-attribute 'variable-pitch nil :font "Arial-11")
(set-face-attribute 'fixed-pitch nil :font "Consolas-11")
(set-face-attribute 'default nil :font "Consolas-11")
(set-fontset-font nil 'symbol (font-spec :family "Segoe UI Symbol" :size 11.0))
(set-fontset-font nil '(120491 . 120491) (font-spec :family "Cambria Math" :size 11.0)) ; Windows patch to display "delta 𝚫".
(add-hook 'text-mode-hook 'variable-pitch-mode)

;; Set theme
;;; (Optional) Setting `custom-safe-themes' to t.
;;; This prevents Emacs from asking if it is safe to load the theme.
(setq custom-safe-themes t)

;;; Automatically load the theme you like
;;; I am using Modus Operandi (light theme) here

The new delta symbol looks like this with using the Consolas font:

zaeph · July 13, 2020, 5:37pm

Oh yes, sorry that I forgot to ping you on this. The change was indeed prompted by this series of posts.

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(tips) How to display "delta" symbol with Windows font

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