Due to customization wishes I created a map in Adobe Illustrator which means my .tiff file has no metadata like CRS, extent etc. when I export it.
To manually set the spatial extent I would need an option like it used to be in the properties menu (How to edit a vector layer extent?) but it was removed.
I can't find a similar option in a newer QGIS version (3.14 or higher) for raster data. Though the menu to set the extent metadata is still there it is only for documentation purpose and does not actually change the size of the map on the canvas. If you know how to achieve this while keeping RGB values, please help me.