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After making a new buffer, font-lock-mode could either be enabled on disabled. For instance, if I use (text-mode) or (org-mode) will automatically enable font-lock-mode. However, for (fundamental-mode), font-lock-mode is off.

Solution 1 for colour printing

For printing in colour, I can enable font-lock-mode if it is disabled, then change the colour with (propertize ... 'font-lock-face ...). Finally, disable font-lock-mode as it was originally.

Solution 2 for colour printing

Another solution is to test whether font-lock-mode in on or off.

If font-lock-mode is off, use (propertize ... 'face ...).

If font-lock-mode is on, use (propertize ... 'font-lock-face ...).

Then one can apply both properties, so the then colour will work no matter whether font-lock-mode is on or not.

Is there any particular solution which is preferable over the other?

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  • In Solution 2, if font-lock-mode is off, what face are you using in the propertize`?
    – NickD
    Commented Dec 7, 2022 at 20:50
  • I am doing this (insert (propertize "G" 'font-lock-face '(:background "#3D3DFF" :foreground "black"))).
    – Dilna
    Commented Dec 7, 2022 at 21:02
  • The question was: what do you do in the other case? You say: If font-lock-mode is off, use (propertize ... 'face ...) - what face is that?
    – NickD
    Commented Dec 7, 2022 at 21:36
  • It is (insert (propertize "G" 'face '(:background "#3D3DFF" :foreground "black"))).
    – Dilna
    Commented Dec 7, 2022 at 21:42
  • Sorry - I misunderstood.
    – NickD
    Commented Dec 7, 2022 at 21:47

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