In the Emacs manual, read the "Saving Emacs Sessions" chapter (or get there from the 'desktop-save-mode' function documentation). Emacs can save and restore you

In the Emacs manual, read the "Saving Emacs Sessions" chapter (or get there from the 'desktop-save-mode' function documentation). Emacs can save and restore your current session, with opened files and windows layout, and as usual it's highly configurable. By default it uses a global session context, but for example I configure mine to save the session locally in the directory where emacs is started. Then I can have several projects in parallel, and when I start emacs in the project top level directory it restores the session for this specific project. I also make the session saving file name machine specific, and ignored by unison for file synchronization. So the layout is specific for each machines with possible different screen setup leading to different window organizations. Just an example, you can tune it to fit your own needs --- that's the whole point of Emacs to me.