We are collaborating on a project, each member is responsible for a topic.
The file structure is like this. Aiac-paper is the main file, and I added every file with \include{...}. My question is, is something like that possible? I compile only Abstract.tex another one compiles only Data.tex. There are lots of text which is not my business, and vice versa.

\include{Abstract}, then it will do so. If you want to be able to compileAbstract.texon its own, you can try the subfiles package, but I don't know how well that will work with Overleaf. – Teepeemm Jul 28 '23 at 20:21\includeyou are always making the pdf of the main document not your chapter – David Carlisle Jul 28 '23 at 20:54docmutepackage simply ignore the preambles of the subdocuments. Therefore the contents of every part must be compatible with the main preamble, but the subdocuments could have even different formats (margins, etc.) for the part previews. – Fran Jul 29 '23 at 08:50