diff --git a/.README.md b/.README.md
index 979eb74..cb455ef 100644
--- a/.README.md
+++ b/.README.md
@@ -1,12 +1,16 @@
-# TODO: add info how to use configs for gnome, tmux & nvim. 
 # Custom system config.
+This is my own custom config that I use on my GNU/Linux machines. Not ment to be used by anyone else.
+
 # Table of contents.
+
 1. [General info.](#general-info)
 2. [Load Gnome settings.](#load-gnome-settings)
 3. [Navigation.](#navigation)
+4. [Bash commands.](#bash-commands)
 
 # General info.
-This is my own custom config that I use on my GNU/Linux machines. Not ment to be used by anyone else. It includes:
+
+It includes:
 1. Git config (excluding user info).
 2. Bash scripts and environment.
 3. Tmux config.
@@ -22,13 +26,255 @@ This is my own custom config that I use on my GNU/Linux machines. Not ment to be
 13. Custom fonts.
 
 # Load Gnome settings.
+
 To load Gnome settings run `dconf_load`.
 
 # Navigation.
-Navigation principles are shared between Gnome, Tmux and Nvim. The only difference is "Leader" key. Gnome uses `Super` key, Tmux uses `Meta (alt)` key and Nvim uses `Space`. The rest somewhat repeats itself.
+
+Navigation principles are shared between Gnome, Tmux and Nvim. The only difference is the *"Leader"* key. Gnome uses *Super* key, Tmux uses *Meta (alt)* key and Nvim uses *Space*. The rest somewhat repeats itself.
 
 ## Gnome
-key|action
+
+Key|Action
 ---|---
-`Super+q`|Move to the left workspace.
-`Super+e`|Move to the right workspace.
+`Super+Esc`|Lauch Terminal emulator.
+`Super+q`|Switch to the left workspace.
+`Super+e`|Switch to the right workspace.
+`Super+Q`|Move window to the left workspace.
+`Super+E`|Move window to the right workspace.
+`Super+\|`|None.
+`Super+-`|None.
+`Super+w`|Toggle window maximize.
+`Super+s`|Minimize window.
+`Super+a`|Snap window to the left.
+`Super+d`|Snap window to the right.
+`Super+z`|Lock session.
+`Super+x`|Close window.
+`Super+c`|Minimize all windows.
+`Super+v`|Take a screenshot.
+`Super+f`|Toggle window fullscreen.
+
+## Tmux.
+
+Key|Action
+---|---
+`Meta+Esc`|New window.
+`Meta+q`|Switch to the left window.
+`Meta+e`|Switch to the right window.
+`Meta+Q`|Move window to the left.
+`Meta+E`|Move window to the right.
+`Meta+\|`|Split vertically.
+`Meta+-`|Split horizontally.
+`Meta+w`|Switch to the above split.
+`Meta+s`|Switch to the below split.
+`Meta+a`|Switch to the left split.
+`Meta+d`|Switch to the right split.
+`Meta+z`|Detach from session.
+`Meta+x`|Close window.
+`Meta+c`|Close split.
+`Meta+v`|Visual selection.
+`Meta+f`|None.
+
+## Nvim.
+
+Key|Action
+---|---
+`Space+Esc`|None.
+`Space+q`|Switch to the left buffer.
+`Space+e`|Switch to the right buffer.
+`Space+Q`|Move buffer to the left.
+`Space+E`|Move buffer to the right.
+`Space+\|`|Split vertically.
+`Space+-`|Split horizontally.
+`Space+w`|Switch to the above split.
+`Space+s`|Switch to the below split.
+`Space+a`|Switch to the left split.
+`Space+d`|Switch to the right split.
+`Space+z`|Save all and exit.
+`Space+x`|Close buffer.
+`Space+c`|Close split.
+`Space+v`|Visual selection.
+`Space+f`|None.
+
+### Nvim extra keys.
+
+#### Common. TODO: separate visual and others from common.
+
+Mode|Key|Action
+---|---|---
+Normal, Visual|`5dd`|Repeat following command N (5) times.
+Normal|`.`|Repeat input on selected line.
+Normal, Visual|`<Leader>.`|Repeat command on selected line(s).
+Normal|`zz`|Save all files.
+Normal|`ZZ`, `<Space>z`|Save and quit.
+Normal|`ZQ`|Quit without saving.
+Normal|`v`, `<Space>v`|Visual selection (cursor).
+Normal|`V`|Visual selection (lines).
+Normal|`<C-v>`|Visual selection (block).
+Normal|`gh`|Go to the start of the line.
+Normal|`gl`|Go to the end of the line.
+Normal|`gj`|Go to the end of the file.
+Normal|`gk`|Go to the top of the file.
+Normal|`u`|Undo action.
+Normal|`U`|Redo action (*remaps*: undo whole line), (*default*: `<C-r>`).
+Visual|`u`|Convert selection to lowercase.
+Visual|`U`|Convert selection to uppercase.
+Visual|`~`|Toggle case.
+Normal, Visual|`;`|Enter command mode (*default*: `:`).
+Normal|`<Space>0`|Open shortcuts help.
+
+#### Align.
+
+Mode|Key|Action
+---|---|---
+Visual|`<Space>A`|Align selection from the right.
+Visual|`<Space>a`|Align selection from the left.
+
+#### Autocomplete.
+
+Mode|Key|Action
+---|---|---
+Input|`<C-Space>`|Autocomplete.
+Normal|`<C-Space>`|LSP autocomplete.
+
+#### Comments.
+
+Mode|Key|Action
+---|---|---
+Normal, Visual|`<Space>/`|Toggle selected line(s) comment.
+
+#### File tree.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>1`|Toggle file tree.
+Normal|`<Tab>`|Toggle directory or open file for preview.
+Normal|`a`|Create file/directory.
+Normal|`x`|Cut file/directory.
+Normal|`p`|Paste file/directory.
+Normal|`f`|Filter.
+Normal|`F`|Reset filter.
+Normal|`d`|Delete file/directory.
+Normal|`r`|Rename file.
+Normal|`R`|Refresh.
+Normal|`s`|Open in system app.
+Normal|`S`|Search.
+Normal|`I`|Toggle gitignore filter.
+Normal|`y`|Copy name.
+Normal|`Y`|Copy relative path.
+
+#### Fold.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>o`|Toggle fold.
+Normal|`<Space>O`|Fold everything.
+
+#### Git.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>g`|Toggle git inspection mode.
+
+#### Macros.
+
+Mode|Key|Action
+---|---|---
+Visual|`mw"`|Wrap selection in ".
+Visual|`mw3"`|Wrap selection in 3x ".
+Visual|`mw'`|Wrap selection in '.
+Visual|`mw(`|Wrap selection in ().
+Visual|`mw{`|Wrap selection in {}.
+Visual|`mw[`|Wrap selection in [].
+Visual|`` mw` ``|Wrap selection in \`.
+Visual|`` mw3` ``|Wrap selection in 3x \`.
+Visual|`mw*`|Wrap selection in *.
+Visual|`mw2*`|Wrap selection in 2x *.
+Visual|`mw3*`|Wrap selection in 3x *.
+Normal, Visual|`mmx`|Markdown: set - [ ] as completed.
+Normal, Visual|`mm `|Markdown: set - [x] as not completed.
+Normal|`mmp`|Markdown: insert paragrapg (2x non-breakable spaces).
+Visual|`mmb`|Markdown: make selection bold.
+Visual|`mmi`|Markdown: make selection italic.
+Visual|`mms`|Markdown: make selection strikethrough.
+Visual|`mmr`|Markdown: make selection a reference.
+Visual|`mmc`|Markdown: make selection a code block.
+Normal|`mi`|Copy and increment selected line.
+Normal|`ma`|Select all.
+
+#### Navigation.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>w`|Switch to the split above.
+Normal|`<Space>a`|Switch to the split left.
+Normal|`<Space>s`|Switch to the split below.
+Normal|`<Space>d`|Switch to the split right.
+Normal|`<Space>q`|Swtich to the buffer left.
+Normal|`<Space>e`|Swtich to the buffer right.
+Normal|`<Space>Q`|Move the buffer left.
+Normal|`<Space>E`|Move the buffer right.
+Normal|`<Space>x`|Close the buffer.
+Normal|`<Space>X`|Close all invisible buffers.
+Normal|`<Space>m`|Move split.
+Normal|`<Space>\|`|Split vertically.
+Normal|`<Space>-`|Split horizontally.
+Normal|`<Space>c`|Close split.
+Input|`<C-h>`|Move left.
+Input|`<C-l>`|Move right.
+Input|`<C-j>`|Move down.
+Input|`<C-k>`|Move up.
+
+#### Telescope.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>ff`|Find files.
+Normal|`<Space>fg`|Find grep (find text within files).
+Normal|`<Space>fb`|Find buffer.
+Normal|`<Space>fh`|Find help.
+Normal|`<Space>ft`|Find treesitter (vars, functions etc).
+Normal|`<Space>fa`|Find all (default treesitter window).
+
+#### Terminal.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>4`|Open terminal.
+Terminal|`<Esc>`|Detach from terminal.
+
+#### To-do.
+
+Write `TODO:` or `NOTE:` to make it searchable.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>3`|Open to-do list.
+
+#### Trouble.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>2`|Open LSP trouble list.
+
+#### Update.
+
+Run `:Update` to update everything.
+
+#### Which key.
+
+Mode|Key|Action
+---|---|---
+Normal|`<Space>0`|Show context hotkey help.
+
+#### Window management.
+
+Mode|Key|Action
+---|---|---
+Normal|`-`|Decrease split size vertically.
+Normal|`_`|Increase split size vertically.
+Normal|`\\`|Decrease split size horizontally.
+Normal|`|`|Increase split size horizontally.
+Normal|`<Space>=`|Equalize split sizes.
+
+# Bash commands.
diff --git a/.config/nvim/lua/key/align.lua b/.config/nvim/lua/key/align.lua
index 96f1ab8..fd18de3 100644
--- a/.config/nvim/lua/key/align.lua
+++ b/.config/nvim/lua/key/align.lua
@@ -1,4 +1,4 @@
 require('key/rekey')
 
-rekey_visual('<Leader>A', '<cmd>lua require("align").align_to_string(false, false, true)<cr>')
-rekey_visual('<Leader>a', '<cmd>lua require("align").align_to_string(false, true, true)<cr>')
+rekey_visual('<Leader>A', '<cmd>lua require("align").align_to_string(false, false, true)<cr>') -- align from left.
+rekey_visual('<Leader>a', '<cmd>lua require("align").align_to_string(false, true, true)<cr>')  -- align from right.
diff --git a/.config/nvim/lua/key/autocomplete.lua b/.config/nvim/lua/key/autocomplete.lua
index 4e60b2b..8fb659c 100644
--- a/.config/nvim/lua/key/autocomplete.lua
+++ b/.config/nvim/lua/key/autocomplete.lua
@@ -1,4 +1,4 @@
 require('key/rekey')
 
-rekey_input('<C-Space>', '<C-n>')
-rekey_normal('<C-Space>', '<cmd>lua vim.lsp.buf.code_action()<cr>')
+rekey_input('<C-Space>', '<C-n>')                                   -- autocomplete.
+rekey_normal('<C-Space>', '<cmd>lua vim.lsp.buf.code_action()<cr>') -- LSP autocomplete.
diff --git a/.config/nvim/lua/key/comment.lua b/.config/nvim/lua/key/comment.lua
index ef0d49b..3488181 100644
--- a/.config/nvim/lua/key/comment.lua
+++ b/.config/nvim/lua/key/comment.lua
@@ -1,2 +1,2 @@
-vim.keymap.set("n", "<Leader>/", require("SingleComment").SingleComment, { expr = true })
-vim.keymap.set("v", "<Leader>/", require("SingleComment").Comment, {})
+vim.keymap.set("n", "<Leader>/", require("SingleComment").SingleComment, { expr = true }) -- toggle comment for selected line.
+vim.keymap.set("v", "<Leader>/", require("SingleComment").Comment, {})                    -- toggle comment for selected lines.
diff --git a/.config/nvim/lua/key/filetree.lua b/.config/nvim/lua/key/filetree.lua
index 39996c6..ae6bc9a 100644
--- a/.config/nvim/lua/key/filetree.lua
+++ b/.config/nvim/lua/key/filetree.lua
@@ -1,3 +1,3 @@
 require('key/rekey')
 
-rekey_normal('<Leader>1', '<cmd>NvimTreeToggle<cr>')
+rekey_normal('<Leader>1', '<cmd>NvimTreeToggle<cr>') -- toggle file tree.
diff --git a/.config/nvim/lua/key/fold.lua b/.config/nvim/lua/key/fold.lua
index 9df6d91..3d904b8 100644
--- a/.config/nvim/lua/key/fold.lua
+++ b/.config/nvim/lua/key/fold.lua
@@ -1,4 +1,4 @@
 require('key/rekey')
 
-remap_normal('<Leader>o', 'za')
-remap_normal('<Leader>O', 'zx zM')
+remap_normal('<Leader>o', 'za')    -- toggle fold.
+remap_normal('<Leader>O', 'zx zM') -- fold everything.
diff --git a/.config/nvim/lua/key/gitsigns.lua b/.config/nvim/lua/key/gitsigns.lua
index 0514f81..a1d8c69 100644
--- a/.config/nvim/lua/key/gitsigns.lua
+++ b/.config/nvim/lua/key/gitsigns.lua
@@ -1,3 +1,3 @@
 require('key/rekey')
 
-rekey_normal('<Leader>g', '<cmd>Gitsigns toggle_current_line_blame<cr><cmd>Gitsigns toggle_word_diff<cr><cmd>Gitsigns toggle_linehl<cr>')
+rekey_normal('<Leader>g', '<cmd>Gitsigns toggle_current_line_blame<cr><cmd>Gitsigns toggle_word_diff<cr><cmd>Gitsigns toggle_linehl<cr>') -- toggle git inspection mode.
diff --git a/.config/nvim/lua/key/navigation.lua b/.config/nvim/lua/key/navigation.lua
index 7c841b0..a15154e 100644
--- a/.config/nvim/lua/key/navigation.lua
+++ b/.config/nvim/lua/key/navigation.lua
@@ -17,7 +17,7 @@ rekey_normal('<Leader>Q', '<cmd>BufferLineMovePrev<cr>')
 -- rekey_normal('<Leader>x', '<cmd>bd!<cr>')
 rekey_normal('<Leader>x', '<cmd>bp<bar>sp<bar>bn<bar>bd<cr>')
 
--- move window.
+-- move window. TODO: remove?
 rekey_normal('<Leader>m', '<cmd>WinShift<cr>')
 
 -- splits.