Linker
Mass Edit allows you to link placeables together thus keeping them together at relative positions to one another whenever you move or rotate them.
Linking is done through a Linker Menu from which you can manage links by creating new link nodes, connecting placeables to them, removing them, and changing link types.
Currently the menu can only be accessed via the Open Linker Menu keybinding which is set to Shift+Q by default.
If the menu is opened without any selected placeables, then the menu will display all links preset on the current scene.
If you do have placeables selected, only links for those placeables will be shown.
A link node is created via a Dobule-Click on any empty point within the window.
Placeable can then be attached by selected them and pressing the Attach Selected to Link control in the left pane.
creatingLink.mp4
Placeables can also be attached from across multiple layers via the Attach Multi-Layer Select to Link control.