How do I activate newGRF's in an existing game?

[MrNoName114]

I watched a video about turning it on but after trying the command it didnt show the seccond window like in the video. Also tried another command in the comment section but it didnt work. What do I do? [youtube]https://youtube.com/shorts/bOjP6pOBP_w? ... T9td3V5Hlk[/youtube] Video link.

[kamnet]

Click and hold the Options button (gear icon) then navigate down to "NewGRF Settings".

If that menu doesn't appear, double-check that you've actually enabled the setting.
EDIT: I see MJ4 is using the wrong command, it is actually: set scenario_developer true

And to re-iterate, this isn't at all safe. Make backup of your openttd.cfg file, proceed with caution. More info: https://is.gd/TTDAddNewGRFs

[MrNoName114]

Thank you! It worked.