From VFXPedia

Flow Options

The Flow Options are contained in the flow context menu. This submenu contains several choices that can be used to customize how the flow looks and behaves.

Flow Options' Context Menu

Pipes Always Visible

This option will cause pipes to be rendered on top of the tools instead of beneath them.

Aspect Correct Tile Pictures

This forces the display of tile pictures to be aspect corrected, which is slower but more accurate.

Full Tile Render Indicators

When a tool is rendering, a small green light usually appears in the bottom right corner of the tile. Enabling this option causes the entire tool to flash green while it is rendering, which makes it easier to identify what tool is processing in a large, complex flow.

Show Grid

This option can be used to enable or disable the display of the light grid on the flow's background.

Show Instance Links

When this option is enabled, the flow draws a green line between an instanced tool and its parent.

Show Navigator

Enabling this option displays a small overview window of the entire flow in the flow editor's top right corner. The keyboard shortcut V can be used to toggle this option's state on an active flow.

Build Flow Vertically/Horizontally

This option is used to determine whether new tools will be added beneath the current tool or to the right of the current tool.

Orthogonal/Direct Pipes

Use these two options to decide if Fusion will draw pipes between tools as Direct (straight) lines or Orthogonal (bent) lines.