Expand, collapse, navigate
A lens can hold up to 1,000 issues across many levels of hierarchy. Foundation gives you mouse and keyboard controls to move around quickly and keep the view readable.
Expand and collapse a branch
Section titled “Expand and collapse a branch”- Click the chevron (▸) at the left of any parent row to expand it. The chevron rotates and the children appear.
- Click an expanded chevron (▾) to collapse the branch.
- Double-click a parent row’s Summary cell to toggle expansion.
Collapsed rows hide all descendants until you expand again.
Set the visible depth
Section titled “Set the visible depth”Use the Depth control in the toolbar to expand or collapse the whole tree to a specific level.
- Click Depth in the toolbar.
- Choose a level:
- Collapse all — shows only top-level rows.
- Level 1 / Level 2 / Level 3 — shows the tree down to that depth.
- Expand all — shows every row.
Depth is persisted per view, so you can save a “high-level rollup” view at depth 1 and a “full detail” view at expand-all in the same lens.
Keyboard navigation
Section titled “Keyboard navigation”Click any row to give the grid keyboard focus, then use:
| Key | Action |
|---|---|
| ↑ / ↓ | Move up / down one row |
| ← / → | Collapse / expand the current row |
| Home | Jump to the first row |
| End | Jump to the last visible row |
| Page Up / Page Down | Scroll by a visible page |
| Enter | Enter edit mode on the focused cell |
| Escape | Exit edit mode without saving |
Jump to a row with the command palette
Section titled “Jump to a row with the command palette”- Press Cmd+K (macOS) or Ctrl+K (Windows / Linux).
- Start typing an issue key or summary.
- Pick a result.
The grid scrolls to the matched row, expands its ancestors, and highlights it briefly.
Search within a lens
Section titled “Search within a lens”Press Cmd+F (macOS) or Ctrl+F (Windows / Linux) to open the in-lens search. Type to filter rows that match (and their parents stay visible so the hierarchy stays intact). Clear the search to restore the full view.
Search matches are highlighted directly in the cell text.
Collapsed state is remembered
Section titled “Collapsed state is remembered”Foundation remembers which rows you had collapsed per lens, so when you come back the tree looks the same. This is stored in your browser’s localStorage, so it’s per-device.
- When reviewing a large lens, set Depth to Level 2 or Level 3 and expand only the branches you care about.
- Use the Inspector Panel on the right to see an overview of the selected row without expanding its children.
- If a lens feels slow, collapse most branches before dragging, grouping, or sorting — the grid renders fewer rows.