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Manipulating the graph: Layouts

Visualization controls

On the Workspace, various controls are available on the right-bottom of the screen:

  • The Locate button centers the graph on the screen.

  • The Zoom In/Zoom Out button is to zoom in or zoom out of our graph.

  • The Layout button give us various options to organize our graph.

A click on the layout button will apply the current layout, which is a fast force-directed layout by default. Three categories of layouts are available: force-directed, hierarchical and radial. They come with pre-defined flavors:

Force-directed layout

Such layouts position nodes according to their connections: connected nodes are usually closed to each others, while disconnected nodes are usually pushed further.

By setting "incremantal expand" to active, force-directed layouts will be applied only on new nodes added to the visualization.

Best Mode (default): Takes the longest time to compute new node positions but provides better results than the Fast Mode.

Fast Mode: Quickly finds new node positions but some overlapping nodes may exist.

Hierarchical layout

Such layouts organize nodes in different layers automatically by aligning nodes of each layer either vertically or horizontally. The root nodes are automatically found.

Top-to-bottom Mode: Will position root nodes at the top of the screen.

Bottom-to-top Mode: Will position root nodes at the bottom of the screen.

Left-to-right Mode: Will position root nodes at the left side of the screen.

Right-to-left Mode: Will position root nodes at the right side of the screen.

Radial layout

Radial layouts position nodes around the currently selected node (used as center of the layout) based on their graph-theoretical distance (shortest path in the graph). This is useful for revealing layers in data and for drawing the rest of the graph in its relation to the pre-defined focus node.

Best mode: Will use an energy model to produce more readable layouts. It is also capable of handling special cases like disconnected components.

Fast mode: Will use a geometrical model, which is faster but can produce more overlapping edges.