Views are, by default, shown at root level. However, focus can be shifted to focus, (root) at a different level. In map view, the focused element forms the map background (its container); in other views the focused item is the root of the view.
Focus View ('hoist')
In Outline, Chart or Treemap views, Focus View focuses the view on the currently selected note and its descendants. A focused view is subtly like a map except that in a map you cannot access the contents of the parent container. Conversely, in a focus view you can see/edit the container but you cannot add siblings to it; this is because the view's scope for adding/removing notes restricted entirely within the root notes descendants.
Thus, in a focused view, siblings cannot be added to to the root (top) note, only children/descendants.
Expand View ('drill down')
Expand View moves the current view 'up' one level. Although there is no menu item, the opposite keyboard short cut to this method achieves a 'drill down' one level if the current note is a container.
Navigating view focus
To navigate from a focused view you can move scope:
- Up (expand/hoist)
- Click the desired item in the view pane breadcrumb bar (moves directly to that scope).
- Map view: Up-arrow key (↑). Expand view one outline level.
- View menu -> Expand View. Expand view one outline level.
- Expand View shortcut.
- Down (focus/drill-down)
- Treemap: Select and double-click a descendant. Focus view one outline level down.
- Outline/Chart: double click a note's icon. Focus view one outline level down.
- Map: double-click a container's viewport area (Map). Focus view one outline level down.
- Map: 'Drill-down' shortcut. This is a useful trick in that it can drill down a level even if a container has its viewport hidden by expanding the title area.