[xgap] 5.4 GraphicSubgroupLattice, Moving Vertices

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# 5.4 GraphicSubgroupLattice, Moving Vertices

In order to move a vertex, place the pointer inside the vertex using the mouse, and press the left mouse button. Hold the mouse button pressed, and start moving the pointer by moving the mouse. The vertex will now follow the pointer, but it is not possible to move the vertex out of the boundaries of its level. or lower than a vertex of a group of smaller size. As soon as you release the left mouse button the vertex will stop following the pointer and, if the vertex was a member of a conjugacy class, the remaining elements of the class are moved.

If you hold down the SHIFT key before moving a vertex as described above then only the selected vertex is moved but not all members of the same class. You can realign the vertices of a class by selecting one of them and choose `Rearrange Classes` in the `Poset` menu (see Rearrange Classes).

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