I have split my windows horizontally. Now how can I return to normal mode, i.e. no split window just one window without cancelling all of my open windows. I have 5 and do not wa
The command :hide will hide the currently focused window. I think this is the functionality you are looking for.
In order to navigate between windows type Ctrl+w followed by a navigation key (h,j,k,l, or arrow keys)
For more information run :help window and :help hide in vim.
:help window
:help hide