Best way to get handle on the Ticks properties

Question

There are a lot of questions already on Ticks. However I did not find a better way to handle ticks place, size etc.

I have a simple example where I want have some handle on the ticks position and size. I found the undocumented functionality Charting`ScaledTicks from some of the previous questions in this forum which I think gives a great handle to tick-size. But when it comes to choosing the Major/Minor tick position I could not so far use it. And the problem is I do not know where I will get more information on this (apart from typing ?Charting`ScaledTicks).

Let’s take the following example where I want to set my Major ticks on even-places like 600, 800, ... etc.

ListLinePlot[
  Table[{x, x}, {x, 500, 2000, 100}],
  Frame -> True,
  FrameStyle -> BlackFrame,
  FrameTicks -> {
    {Charting`ScaledTicks[{Identity, Identity}, TicksLength -> {.05, .02}], None},
    {Charting`ScaledTicks[{Identity, Identity}, TicksLength -> {.05, .02}][400, 2000, 8], None}
  }
]

After playing a bit, I am able to show the Major ticks on x-axis appearing on even-100-places, the minor ticks are gone. I am sure that I am missing something for the minor ticks in the Charting`ScaledTicks options but I dont know what should I do to make them reappear.

Here is an example where y-axis is automatically taking Major ticks, in the x-axis I try to force Major ticks appear at even-hundred places.

How do I set position and size of Major ticks?

Answer 1

The way it can be done as follows

ListLinePlot[
  Table[{x, x},{x, 500, 2000, 100}],
  Frame->True,
  FrameTicks -> {
    {Charting`ScaledTicks[{Identity, Identity}, TicksLength -> {.05, .02}], None},
    {Charting`ScaledTicks[{Identity, Identity}, TicksLength -> {.05, .02}][400, 2000, {8, 5}], None}
  }
]

First of all, through TicksLength ->{0.05,0.02} one can control the size of Major and Minor ticks. Secondly the position for Major ticks can be controlled through (NdivM below),

Charting`ScaledTicks[{Identity, Identity}, TicksLength -> {.05, .02}][min, max, {NdivM, Ndivm}]

There one has to also keep Ndivm for Minor ticks. In the above example I chose min=400, max=2000, NdivM=8, Ndivm=5.

Thanks to @CA Trevillian now I know how to see the undocumented definition of such functionalities and all the possibilities it can do. For example for this case one can do

 Needs["GeneralUtilities`"];
 PrintDefinitions[Charting`ScaledTicks]

and can see everything about this function.