You can use the keyboard shortcut Ctrl + Alt + Home (Command+Option+Home on Mac) to move the Anchor Point to the center of the layer or the Pan Behind tool (keyboard shortcut Y) to move the anchor point manually. Hope this helps.
Use the keyboard shortcut 'y' to select the Pan Behind/Anchor Point tool. Turn on Snapping. Hover over the Anchor Point, click, then drag to the center of the layer. The Anchor Point will snap to any corner, the middle of any edge, the horizontal or vertical center line, or the center of the same layer or any other layer in the comp. You can also snap to any vertex on a shape layer or mask path, or even on the center of a mask or closed shape layer path.
If the graphic is centered on the layer, everything should work just fine. If the graphic is not centered on the layer you will have to do the best you can. Carefully drawing a mask around the graphic might help.
Your cropped screenshots don't tell us what you are trying to accomplish. The anchor point that is showing could be on any layer in the comp. If the instructions I have given don't clear things up let us know and show us the entire comp with the modified properties of the problem layers revealed. Just select them, press 'uu', then share a screenshot.
Thanks for sharing the video.
Let us know if it helps.
Thanks for explanation.
Answer to second question is okey it worked.
In the answer to first question, I assume that there is no short cut key to snap anchor point to the centre of RHS edge of the layer. Only I have to do manually with approximation.
I took 5 minutes to go through the workflow I would use. Here you go:
Thanks for the video.
You see value is 20 but I can do 36 duplications. How is it possible? In my view it should not come more than 20.
If you divide the layer number (1) by 10 you get .1. .1 times 360 equals 36. Each new layer rotates another 36º so 10 of them make a full circle. If you set the number to 10, it takes 10 layers. Set it to 40 and it takes 40 layers to make a full circle. You can keep duplicating layers as many. times as you like but when the layer count goes above the number you set (20) the additional layers will be right on top of each other. so you won't see any difference in the composition.
Did you follow that?
Put another layer in between the 20 layers and there will be a hole in the circle where the other layer is. It's all simple math. 1 X 20 / 360 = 18. 2 * 20 / 360 = 36. Each layer rotates 18º more than the previous number and 20 of them will create a full circle.