This mod adds keybindings allowing you to debug pipe and belt systems. It allows you to:

• Highlight all pipes, fluid assemblers, fluid tanks, etc, connected to the selected fluid object. The default key is Left Control, you can rebind it in settings.
• Highlight all belts connected to a selected belt. You can additionally set a hotkey to only highlight upstream/downstream belts in settings, it's unbound by default.

Due to the way Factorio works, you may have to wait for a few seconds after placing a belt for the mod to work properly (the game doesn't immediately build the transport lines for the mod to look at).