Position the cursor anywhere on a diagram element, then hold
down the left mouse button, and drag the element to where you want it to go.
Connections will be partially "rubber-banded" - only the line segments connected to the block being moved will adjust appropriately.
If a line ends at a line segment involved in the
movement, it will not adjust automatically - the head will have to be dragged, using the arrow "drag" functions (see below).
Three "drag" functions have now been specified for arrows, allowing the user to move, respectively, the tail or head of the selected arrow, or to insert or move a bend in the line. When inserting a new bend, you can drag it until you release the mouse button.
If the head or tail of an arrow is dragged into contact with a different diagram block, it becomes "attached" to that block.
A section of the diagram can be dragged (permanently) by creating an Enclosure block around it, expanding the enclosure by mousing on its corners, and then selecting the Drag Contents function of the Enclosure block. The whole Enclosure can then be dragged, together with its contents, by dragging the rectangle at the top of the enclosure. The Enclosure block can be deleted afterwards.