How to change the face of only a text segment in org-agenda?

Hi all! I am trying to do this on my \`org-agenda\` [MY PROJECT] ↳ NEXT My next task :my-tag: wherever it finds a sub-tree like this, * MY PROJECT :my-tag: ** NEXT My next task However, I want that the text `[MY PROJECT]` has a distinct face (`nano-strong`, for example). I tried using a `propertize`, but it does not change the face that I want. This is my best try, (defun my/org-agenda-format-breadcrumbs () "" (let ((breadcrumb (org-format-outline-path (cdr (org-get-outline-path))))) (if (string-empty-p breadcrumb) (concat " ") (concat "[" (propertize breadcrumb 'face 'nano-strong) "]\n ↳")))) (setq org-agenda-prefix-format '((agenda . " %i %s") (todo . "%i %-12:c") (tags . "%(my/org-agenda-format-breadcrumbs)") (search . "%i %-12:c"))) What am I doing wrong? Thanks!

Have you tried taking out the `(propertize` part, running this agenda, then doing `describe-face`? The square brackets may also get the face though.

I modified the `defun` and removed the `propertize` part just to test it out. Using `describe-text-properties` over `[MY PROJECT]` I got this: ``` Text content at position 5691: There is an overlay here: From 5647 to 5696 face hl-line priority -50 window nil There are text properties here: breadcrumbs nil done-face org-agenda-done dotime nil duration nil effort nil effort-minutes nil extra "" face default format [Show] help-echo "mouse-2 or RET jump to Org file \"~/Dropbox/home/documents/org/gtd/actionable.org\"" level " " mouse-face highlight org-agenda-type tags org-category "actionable" org-complex-heading-regexp "^\\(\\*+\\)\\(?: +\\(CNCL\\|DONE\\|NEXT\\|TODO\\|WAIT\\)\\)?\\(?: +\\(\\[#.\\]\\)\\)?\\(?: +\\(.*?\\)\\)??\\(?:[ ]+\\(:[[:alnum:]_@#%:]+:\\)\\)?[ ]*$" org-hd-marker [Show] org-last-args [Show] org-marker [Show] org-not-done-regexp "\\(NEXT\\|TODO\\|WAIT\\)" org-priority-highest 65 org-priority-lowest 67 org-redo-cmd [Show] org-series t org-series-cmd [Show] org-series-redo-cmd [Show] org-todo-regexp "\\(CNCL\\|DONE\\|NEXT\\|TODO\\|WAIT\\)" priority 2000 tags [Show] time "" time-of-day nil todo-state [Show] ts-date nil txt [Show] type "tagsmatch" undone-face default ws-butler-chg chg ```

I suggested `face` so you cocould narrow down what creates you [My Proj].

If I click in the `face` property, I have this [https://imgur.com/a/a6AVn3D](https://imgur.com/a/a6AVn3D)

The problem is the `propertize` isn't respected.

For doing something related, I use a hack with an advice around` org-agenda-highlight-todo`: (defun my-org-agenda-highlight-todo (x) (let* ((done (string-match-p (regexp-quote ":DONE:") x)) (x (replace-regexp-in-string ":TODO:" "[X] x)) (x (replace-regexp-in-string ":DONE:" "[ ]" x)) (x (if done (propertize x 'face 'nano-faded) x))) x)) (advice-add 'org-agenda-highlight-todo :filter-return #'my-org-agenda-highlight-todo)

Right. I am saying maybe drop that approach. I have `'(org-agenda-date ((t (:background "WhiteSmoke" :foreground "#00538b"))))` within `custom-set-faces` as an example.

Oh right! Yes the problem is that I don't want to chage all the face, but only a portion of it. In this case ``` [MY PROJECT] ... NEXT My task ``` has the same face, but I just want to change the color of the first line.