I have gone from node top to node coreutils. When i press n it goes into the introduction node. If i press u it goes back into node coreutils.
In the help menu it says.
n Go to the next node on this level. u Go up one level. So if n preserves the level, how can u return me back to the same node?
edit: I was using the info reader not emacs.
Here is a diagram of what I expected.
. ↑ |n \|u .<--. where the dots are nodes
u does not undo n.
It's a tree structure, and u takes you up to the parent node.
You can navigate forward and back with n/p or [/] (refer to docs for the difference), and you can use l to go back to the previous node you were looking at no matter where you came from.
I strongly recommend the tutorial: C-h i h
Note that the Top node (table of contents) tends to be a special case, and not strictly on a higher level than the subsequent nodes.
If the "Introduction" is numbered "1", you can think of the Top node as implicitly numbered "0" at the same level for the purposes of navigating with n and p.
Node 1 will actually specify Prev: Top, Up: Top and therefore either p or u would take you back to the Top node. Similarly, the Top node will have a Next declaration pointing to the Introduction node.
emacs -Q(no init file)? If not then bisect your init file to find the culprit. If yes, consider filing a bug report: by default,ushould move up to a parent node, if there is one.n"? Ifntakes you to a child node then it's normal thatutakes you back to that child's parent. Is that "undoingn"?