Ctrl- and shift-click only added single rows to the selection. With many objects spread over the hierarchy, picking a run of them meant clicking each one. Shift-click now selects everything between the anchor and the clicked row, as in a file explorer. - The anchor is the row last clicked without shift, plain or with ctrl. A second shift-click redraws the range from the same anchor. - Ctrl+shift-click adds the range to the current selection instead of replacing it. - A collapsed group inside the range brings all its members. Children hidden under a collapsed parent stay out, since they are not shown. - Without an anchor from the hierarchy, the primary object picked in the scene view serves as anchor. With no selection at all, shift-click adds the single row as before. - The range rule is a pure function in hierarchyRange.ts, so it is tested without a browser. HierarchyPanel keeps the anchor. Not checked in the browser: ctrl+shift-click and the anchor taken from the scene view. Only the code path covers them. Tests: - ./check.sh: 178 files, 2557 tests, CHECK EXIT 0 - e2e 1 + 52: ALL PASSED, 23 checks - 5 new unit tests in tests/editor/hierarchy-range.test.ts - New e2e check 52h with real clicks - Counter-check: without the range, 52h fails with ["o2","o5"] Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>