Click on this icon to switch on and off magnetic snap to vertical
frame edges. When switched on, frames being created or moved will snap
to the vertical edges of already existing frames, though you can set a
separation between them with the Magnetic frame range
function
of the Guidelines module. If the new frame is being created above or
below an existing frame and is smaller or larger, then it will be
enlarged or reduced respectively as both its left and right edges will
snap to the existing frame boundaries. If it is within or left/right
of the existing frame then its left or right edge will snap to the
nearest vertical frame boundary.
