Contents of a group can be filtered by text, keywords or change date within headings, code blocks, images or any other marked up text. Great for splitting up larger documents into manageable chunks while still keeping an overview of the whole project and having the ability to move sections around quickly. Sheets can be split up, merged, glued together and easily moved around in the sheet pane by dragging and dropping. Groups can have an unlimited amount of subgroups and the title of subgroup shows up in the pane view.
It organizes content in groups (folders) and sheets (files), has a powerful, easy to use search and allows adding keywords to attachments to help them be organized and found quickly. Great tools for organizing and finding files Ulysses saves everything in the app so there's no file management outside of the editor involved.