The move drag remembers the plane it places loose art on. Pressing 4
during the drag, or dragging on after it, previews and commits the move
on that plane instead of dropping it. A 1-3 key pressed before the drag
threshold also sets the plane the move uses.
perspective.move takes constrain: true instead of a plane-space
direction. For each object, the command snaps the move to the nearest
axis or 45-degree diagonal of that object's own plane, so a selection on
several planes keeps every object on a line of its plane. The tool sends
the raw pointer with the flag.
On a diagonal, Snap to Grid now moves along the diagonal by the nearer
per-axis correction, so that edge lands on its gridline.
perspective.move takes an optional constrain: [dx, dy], a plane-space
direction. For an in-plane move, Snap to Grid's correction is projected
onto that direction, so a move the Shift key constrains to a plane axis
or a 45-degree diagonal stays on that line when an object edge lies near
a gridline. The Perspective Selection tool sends the direction for
Shift moves and copies. Moves without the param behave as before.
Holding Shift while dragging objects with the Perspective Selection tool
snaps the move, in the plane's own coordinates, to the nearest plane axis
or 45 degree diagonal. This applies to plain moves and to Alt and
Ctrl+Alt copies. The preview, the final move and the measurement label
use the snapped point. Pressing or releasing Shift, pressing 5 and
pressing 1 to 4 during the drag recompute the preview from the pointer;
a move perpendicular to the plane is not constrained.
With the Perspective Selection tool, Ctrl+Alt-drag (Command+Option-drag on
macOS) now copies objects on their perspective plane, as Alt/Option-drag
does. Before, Cmd/Ctrl lent the last selection tool even with Alt held, so
the drag made a flat copy. Cmd/Ctrl alone still lends the last selection
tool, and the cursor follows the same rule.
dotCooCoo