Less mess, right? I have enough information in each of these diagrams to know precisely what this circuit does and also where to look for problems. Hope that this helps. ( Note: do not confuse circuit or schematic diagrams with wiring diagrams; wiring diagrams will usually demonstrate pictures of components such as the pictorial, and also how the entire or part of a circuit will be wired. The distinction is that wiring diagrams generally put an emphasis on actual physical place of necessary elements relative to each individual that basically tell a layman exactly what to do concerning the wiring. )
A design diagram refers to a specific type of circuit design that uses standard electrical/electronic symbols rather than images to show the way the circuit (or a part of it) works. Below is a standard 3-wire motor controller circuit using a standard momentary stop - start pushbutton channel working with a schematic diagram. (Momentary this means that the button/switch you activate will go back to its default position once you physically let go of it, typically by a spring which forces the button/switch to do this.)
Pictorial design diagrams, or pictorial circuit diagrams are essentially the identical thing with the identical purpose, however they use images of elements within the circuit instead of symbols. Again, here is the exact precise circuit (almost except a controller was inserted and they're using conductors L1 and L3 rather than L1 and L2.
Here is a specialized variant of a design diagram called a ladder structure. The principle aim of this diagram is to demonstrate the logic (speaking to electric management ) of a circuit board. This diagram is the one I mostly come across in my line of work, and it is extremely successful for troubleshooting problems or learning the way the circuit works. Some circuits are so enormous that many types of schematic diagrams need to be read in increments in book form (usually with coded numbers so that information can be simpler located ). Again, here is the exact exact circuit since the first 2, however looking at it in ladder type.
Here's another schematic diagram demonstrating the identical circuit, components and connections and it looks different but they fall into precisely exactly the same category.
Think of it this way; a circuit structure is any kind of diagram that demonstrates the way the circuit functions where the most important purpose is that the appropriate wiring of elements and their relationship to each other instead of physical location relative to each other or planning prototypes. However, in some uses classifying diagrams can be challenging so take this as overall advice. I've discovered this is particularly true when working with much more complicated circuits and electronic equipment. I'm going to use a simpler but average industrial circuit because these circuit set ups are exactly the same, but where you can see how each kind of diagram indicates the use of the circuit in their own ways.