In RemNote, everything is a Rem (plural: Rems or Rem): a small, atomic unit of information. Most Rems correspond to bullet points that you type in the outline editor.
However, Rems aren’t always displayed in outline form, and RemNote creates some Rems itself. Examples of things that are Rems but often won't look like bullet points include:
Rows in a table, as well as individual cells in the table
Flashcards are an exception to this pattern. They are not Rems themselves; rather, they are associated with and generated from Rems. A flashcard arrow within a Rem causes associated flashcards to be created in the appropriate directions. When you edit the text of or delete a Rem, the associated flashcards are automatically updated.
Each Rem may have up to one parent (a Rem above it in the hierarchy, indented one level closer to the left) and any number of children (Rems below it in the hierarchy, indented one level closer to the right). We can similarly talk about grandparents, grandchildren, and so on, using standard family relations terminology. Collectively, all Rems higher up the hierarchy (parents, grandparents, great-grandparents, etc.) than some particular Rem are called its ancestors, and any lower down are called its descendants. A top-level Rem is a Rem that has no parent.
You can quickly jump to or select any Rem using global search (Ctrl+P, or Cmd+P on a Mac) or hierarchical search, or zoom in to it when you can see it in the editor by clicking on its bullet point.