I don't see what your problem is in. You can have several materials with different textures on them. then assign each material onto respective object/polygons.

Alternatively, if you are limited to just one texture for some reason, you can still rely on one texture by creating a canvas with three messages one under another; use UV-mapper to assign mapping on objects onto different areas of texture, so you can use just one material and one texture to display different messages

Hi I would like to create a message board with 3 different messages that can be equipped as extras. How can I assign the textures to the individual files. Therefore that I have copied the one file that was already in it and now want to assign the textures to.

Each Extra should have its own texture

[img]https://cdn.discordapp.com/attachments/975400505524236318/1019692558722531369/Screenshot_2022-09-14_213400.png[/img]
[img]https://cdn.discordapp.com/attachments/975400505524236318/1019692558990983208/Screenshot_2022-09-14_213334.png[/img]