Below is a Vim configuration file (.ideavimrc) with descriptions for each configuration option and key mapping.
set nu " Enable line numbering
set relativenumber " Enable relative line numbering
set incsearch " Enable incremental search
set scrolloff=8 " Set the number of lines to keep in view when scrolling
" Plugins
Plug 'preservim/nerdtree' " Plugin for file tree navigation
Plug 'machakann/vim-highlightedyank' " Plugin for highlighting yanked text
" Leader Key
let mapleader = " " " Set the leader key to Space
noremap <Space> <Nop> " Map Space key to do nothing
" Tabbing
nnoremap <S-l> gt " Switch to the next tab
vnoremap <S-l> gt " Switch to the next tab in visual mode
nnoremap <S-h> gT " Switch to the previous tab
vnoremap <S-h> gT " Switch to the previous tab in visual mode
" Clipboard Buffer
nnoremap <leader>d "*d " Delete (cut) to the clipboard
nnoremap <leader>D "*dd " Delete (cut) the entire line to the clipboard
nnoremap <leader>y "*y " Yank (copy) to the clipboard
nnoremap <leader>Y "*yy " Yank (copy) the entire line to the clipboard
nnoremap <leader>p "*p " Paste from the clipboard
vnoremap <leader>d "*d " Delete (cut) to the clipboard in visual mode
vnoremap <leader>D "*dd " Delete (cut) the entire line to the clipboard in visual mode
vnoremap <leader>y "*y " Yank (copy) to the clipboard in visual mode
vnoremap <leader>Y "*yy " Yank (copy) the entire line to the clipboard in visual mode
vnoremap <leader>p "*p " Paste from the clipboard in visual mode
" Terminal
nnoremap <C-t> :action ActivateTerminalToolWindow<CR> " Open terminal
" Quality of Life
nnoremap <leader>s "ayiw :%s/\<<C-r>a\>/<C-r>a/gI<Left><Left><Left> " Search and replace in the entire file
nnoremap <leader>r :action RenameElement<CR> " Rename the current element
nnoremap <leader>= :action ReformatCode<CR> " Reformat code
nnoremap <leader>q :wq<CR> " Save and quit
nnoremap <leader>Q :tabo<CR> " Close all other tabs
nnoremap <C-d> <C-d>zz " Scroll down and center
nnoremap <C-o> <C-o>zz " Scroll up and center
nnoremap <C-i> <C-i>zz " Jump forward and center
nnoremap <C-u> <C-u>zz " Jump backward and center
" Commenting
nnoremap gc :action CommentByLineComment<CR> " Comment/uncomment the current line
vnoremap gc :action CommentByLineComment<CR> " Comment/uncomment selected lines in visual mode
" Documentation
nnoremap <C-k> :action QuickJavaDoc<CR> " Show JavaDoc documentation for the current element
" Navigation
nnoremap <leader>fr :action RecentFiles<CR> " Open recent files dialog
nnoremap <leader>fg :action GotoFile<CR> " Go to a specific file
nnoremap <leader>fi :action FindInPath<CR> " Find text in project
nnoremap <leader>ff :action Find<CR> " Find text in current file
nnoremap <leader>e :NERDTreeFocus<CR> " Focus on NERDTree file explorer
" Code Completion
inoremap <C-y> :action EditorChooseLookupItem<CR> " Choose a code completion suggestion
" Go To
nnoremap gr :action ShowUsages<CR> " Show usages of the current element
nnoremap gi :action ReSharperGotoImplementation<CR> " Go to implementation of the current interface or method
nnoremap gd :action GotToDeclaration<CR> " Go to the declaration of the current element
nnoremap gt :action GotoTest<CR> " Go to the test for the current element
nnoremap gD :action GotoTypeDeclaration<CR> " Go to the type declaration
nnoremap [g :action GotoPreviousError<CR> " Go to the previous error
nnoremap ]g :action GotoNextError<CR> " Go to the next error
" Debugger
nnoremap <leader>b :action ToggleLineBreakpoint<CR> " Toggle a breakpoint