The management of your files in Writer for Windows will be done mostly from the File list of the Library.
On top of the File List is the Sort Bar where you can sort folders and files by Name or Date.
Drag a text file, image or CSV from the File List right onto the Editor to have it embedded in the current document. You’ll see your additional text, image or table render in the Preview.
This is a great way to group many smaller texts into a larger manuscript.
An exclusive feature of iA Writer for Windows Focus Outline shows you the headings as an outline of the entire document. Click any heading in the Outline to jump to that section of the document in the Editor. Just like Focus Mode, only the section of the document you are editing is highlighted in the Outline, so you always know exactly where you are.
Access these in File → Preferences → Library. Here you can:
Navigate Your Files 
The management of your files in Writer for macOS will be done mostly from the File list of the Library. Files Location In the Library, the File List will show you all the folders and files stored in the selected Location from the Organizer (iCloud for example down below). Documents can be moved to, from,
The management of your files in Writer for iOS will be done mostly from the File list of the Library. Files Location The File List will show you all the folders and files stored in the selected Location (iCloud for example). You can: tap a folder to display its contents in the list tap a
The management of your files in Writer for iPadOS will be done mostly from the File list of the Library. Files Location The File List will show you all the folders and files stored in the selected Location (iCloud for example). You can: tap a folder to display its contents in the list tap a
The management of your files in Writer for Android will be done mostly from the Document list of the Library. Where are my files? Storage System Menu The Storage System menu is the root menu of the app, which will appear with the title “Library”. From there, you can select a cloud storage provider (like
The management of your files in Writer for Windows will be done mostly from the File list of the Library. Sort By On top of the File List is the Sort Bar where you can sort folders and files by Name or Date. Embed Files in the Editor Drag a text file, image or CSV