After registering a hierarchy structure in the Close Bone Picker Editor, several commands are available for navigating between hierarchy levels.
Alt + Left Mouse Press > Drag left/right
Navigates to parent/child bones. Even if multiple bones are selected, they will be deselected, leaving only the active bone selected.

Extend Version
Shift + Alt + Left Mouse Press > Drag left/right
Expands the selection toward parent/child direction while keeping the active bone unchanged. You can adjust the selection range by executing the opposite Extend operator. Works individually for each bone even when multiple bones are selected.

Alt + Wheel (Up/Down)
Navigates to sibling bones derived from the same parent. Works even when multiple bones are selected, but only the sibling bone at the active bone's index will be selected.

Extend Version
Shift + Alt + Wheel (Up/Down)
Similar to Parent/Child Extend, expands the selection toward sibling directions while keeping the active bone unchanged. You can adjust the selection range by executing the opposite Extend operator. Works individually for each bone even when multiple bones are selected.

Alt + Left Mouse Press → 下へのドラッグ
Selects the mirrored counterpart bone when bilateral symmetry exists. This is a Blender default feature, but CBP provides an additional shortcut since the default shortcut is difficult to combine with other Pick operations.
Adding Shift performs extended selection.

By combining Extend operations, you can select specific sets like "roots of multiple hair strands" or "only the first joints of the right hand."
However, this add-on aims to simplify bone selection complexity with simple and lightweight operations. Combining Extend operations requires time to learn and can be mentally demanding.
Rather than replacing all bone selection with CBP, focus on "operations that feel good to use" like simple Pick Parent/Child and Pie Menu.
