You can re-arrange IP blocks on the canvas to get a better layout of the BD, and connections between blocks. To arrange a completed diagram or a diagram in progress, you can click the Regenerate Layout button.
You can also move blocks manually by clicking a block, holding the left-mouse button down, and moving the block with the mouse, or with the arrow keys.
The diagram only allows specific column locations, indicated by the dark gray vertical bars that appear when moving a block. A grid appears on the diagram when moving blocks, which assists you in making better block and pin alignments.
It is also possible to manually place the blocks where desired, and then click Optimize Routing . This command preserves the placement of the blocks, unlike the Regenerate Layout command, and only modifies the routing to the placed blocks.