How do I reorder tmux windows?

Question

In screen, I can just type C-a :number 0 to move a window to the top of the window list and push all the other windows down one. What's the equivalent command sequence for tmux? I looked at the man page, but I'm finding it confusing on this point.

Answer 1

The swap-window command is closest to what you want.

"Prefix :" (that is "Ctrl-B :" by default) brings you to the tmux-command prompt. There you enter:

swap-window -s 3 -t 1

to let window number 3 and window number 1 swap their positions.

To swap the current window with the top window, do:

swap-window -t 0

In the unlikely case of having no window at index 0, do:

move-window -t 0

(if base-index is 0, as it is by default).

You can bind that command to a key (T for "top" for example) by adding the following to your ~/.tmux.conf:

bind-key T swap-window -t 0

Answer 2

Adding to Gareth's answer, you can use the following key bindings

bind-key -n C-S-Left swap-window -t -1
bind-key -n C-S-Right swap-window -t +1

Pressing Ctrl+Shift+Left (will move the current window to the left. Similarly right. No need to use the modifier (C-b).

Answer 3

The tmux equivalent to :number 42 is :move-window -t 42.

Answer 4

You can implement an equivalent to screen's number command using an external shell script that chooses between swap-window and move-window. You can bind it to a key that way:

bind < command-prompt -p index "run-shell '~/.tmux.number.sh %%'"

---

~/.tmux.number.sh:

#!/bin/bash
if [ $# -ne 1 -o -z "$1" ]; then
    exit 1
fi
if tmux list-windows | grep -q "^$1:"; then
    tmux swap-window -t $1
else
    tmux move-window -t $1
fi

Answer 5

I renumber windows like this:

Ctrl+b, ., 222

would make the current tmux window (all panes) number 222.

---

Relatedly: When I'm shuffling things around I tend to want to do

Ctrl+b :new-session -d -s "reading"

and from there I can also use Ctrl+b, ., reading to move the current window (all panes at once) over to the reading session. You can browse among sessions with Ctrl+b, s the way you would browse within session using Ctrl+b, w.

HTH

Answer 6

Using swap-window to move to any id: [closest to screen's :number]

# window movement / renumbering like in screen's :number
bind-key m command-prompt -p "move window to:"  "swap-window -t '%%'"

[m for move --> hit prefix-m and enter say 3 . .to renumber window to 3]

Answer 7

Since Ashish Ariga's answer doesn't work on version 1.9a and below. I use < and > to swap window to left and right, respectively, by adding the line below to .tmux.conf.

# swap window to left or right
bind-key -r < swap-window -t -1
bind-key -r > swap-window -t +1

Answer 8

Most simple solution from man, is to use the default bindings:

{           Swap the current pane with the previous pane.
}           Swap the current pane with the next pane.

Answer 9

For those of you who use byobu as your wrapper for tmux, you can swap the current window with the previous or next window with:

Ctrl-Shift-F3
Ctrl-Shift-F4

The key binding defined by byobu for these keys may be of interest:

bind-key -n    C-S-F3 swap-window -t :-1
bind-key -n    C-S-F4 swap-window -t :+1

Answer 10

The approach I use combines a bit of Ashish's answer with piec's; I have alt-left and right arrow bound to a quick little shell callout that moves the window one to the left or the right, unless it is the first or last window, respectfully. I did this because, when you issue a swap +1 at the last window (or swap -1 at the first window), it will still swap, instead of looping back around again like you might expect:

0:one 1:two 2:three 3:zero*

Becomes

0:zero* 1:two 2:three 3:one

Instead of

0:zero* 1:one 2:two 3:three

So, the commands I use stop working when the window has reached the edge of the list:

bind-key -n M-Left run-shell 'tmux list-windows | head -n 1 | grep -q active || tmux swap-window -t -1'
bind-key -n M-Right run-shell 'tmux list-windows | tail -n 1 | grep -q active || tmux swap-window -t +1'

This can easily be combined with base-index and renumber-windows to have a list of windows that start at an arbitrary number and never has any gaps.

If you are using base-index 1 like me and you don't think you'll ever go above 999 windows, you can use a little trick to make it roll properly, though the commands bloat a bit:

set -g base-index 1
set -g renumber-windows on
bind-key -n M-Left run-shell 'if tmux list-windows | head -n 1 | grep -q active ; then tmux move-window -t 999 \; move-window -r \; refresh-client -S ; else tmux swap-window -t -1 ; fi'
bind-key -n M-Right run-shell 'if tmux list-windows | tail -n 1 | grep -q active ; then tmux move-window -t 0 \; move-window -r \; refresh-client -S ; else tmux swap-window -t +1 ; fi'

This works by temporarily moving the last window to the unused index-0 and then calling move-window -r to renumber them starting from 1 again. It works similarly when moving the first window to the end; by picking a huge number you'll never use, it ensures that when move-window -r fires again everything will be numbered like you'd expect. If you're wondering about refresh-client -S, that's necessary because sometimes, while the reordering from move-window will work properly, the status bar won't update until further changes are made. By forcing a refresh of just the status bar (-S), you avoid this.

The only issue I can find with this approach is that swap-window will implicitly alter the last-used window to the one you swapped with. Thus, if you are on window #1, switch to window four and move it back one, you'll find that your last-used window is the new # 4 (formerly #3) instead of #1. There doesn't seem to be a way around this.

Answer 11

you can use base-index to change the starting number for your windows. if you set base-index to 1, then move-window -r will renumber all windows starting at 1, thus freeing up 0 to move a window into its slot:

set base-index 1
move-window -r
move-window -t 0

when done, you could reset base-index to 0 if you want to use move-window -r later without moving your window at 0

Answer 12

tmux-pain-control provides ctrl-b > and ctrl-b < to move the focused window right and left, wrapping around.

Answer 13

Both swap-window -s 5 and swap-window -t 5 swap current window with window 5, but with different semantics.

swap-window -s 5

• window 5 program in effect with current win number.
• recent window number remain unchanged.
• repeat same command will roll back to previous state.

swap-window -t 5

• current program in effect with number 5.
• recent override to current window number.

the number in swap-window -s number and -t number could be both absolute, eg, 5, and relative, eg, -1, +2.

P.S. below is excerpt of tmux statusline illustrating effect of swap-window -s 5

recent:
[0] 0:vim- 1:mpl 2:py2* 3:numpy 4:plot 5:mc

now, after last-window:
[0] 0:vim* 1:mpl 2:py2- 3:numpy 4:plot 5:mc

after swapw -s 5:
[0] 0:mc* 1:mpl 2:py2- 3:numpy 4:plot 5:vim

another swapw -s 5:
[0] 0:vim* 1:mpl 2:py2- 3:numpy 4:plot 5:mc

another last-window:
[0] 0:vim- 1:mpl 2:py2* 3:numpy 4:plot 5:mc

Answer 14

From the tmux window, try the following to swap window 0 with 1:

$ tmux swap-window -d -s 0 -t 1

Answer 15

I think you want to bind a new key combination to the 'choose-window' command.

I know you said you've already read the man page, but you should refer back to it. you need to modify your ~/.tmux.conf file to add a bind-key command.

Specifically, look at page 4 of the following.

tmux man page

Answer 16

This is the method I use. You still can't move a window to an occupied index, but you can move one to a higher (unused index) and rearrange in the gap where the previous index was.

Say you have 3 windows and want to add a fourth but in the place where 3 previously was.

Before you add a new window: Tmux prefix then . will open up the move command. Type in 4 and the index of 3 will now become 4, then simply add another window and it will be at index 3 and your old window will still be at index 4.

Answer 17

First, open the tmux command press and release:

Ctrl + b 

And to change the actual window to the right window (in circular order), just do:

}

To change the actual window to left:

{

• Don't forget to use SHIFT when press } or {.

Answer 18

For what it's worth:

I hacked this script together to be able to order all the windows in a "TUI". It lists all your windows in a temporary file, opens it with your default editor (assumes that you've set $EDITOR). After this you can reorder the lines and after you save and close the file, the windows are reordered accordingly. (This is similar to ordering commits when doing git rebase -i)

#!/bin/bash

# Usage: tmux-mv    
#   Move your tmux windows around in an editor

tmpfile=$(mktemp)
tmux list-windows > $tmpfile
$EDITOR $tmpfile

# Move all windows to 50..x in the order you just specified
# Assumes you don't have 50 windows already(!)
cat $tmpfile | awk -F ":" '{ print " -s " $1 " -t 5" NR-1 }' |\
  xargs -I {} sh -c 'tmux move-window -d {}'

# Move them back down, retaining the order
tmux move-window -d -r
rm $tmpfile

It could probably be improved upon a lot, in particular:

NOTE: You might be moved to another window after running the command.

A gif of it in action (github)

Answer 19

None of the answers here satisfied me, so I wrote a script that (sort-of) mimicks the screen window-moving behavior for tmux.

It detects whether the destination window number is smaller that the smallest window number or bigger than the biggest window number, and if so, nudges all the other windows to the right or left (respectively) and re-numbers them to from 1-N incrementally. This is done with the move-window command.

If the window number is in-between the smallest/biggest numbers (i.e., presumably, matches an existing window number), it just swaps them with the swap-window command.

Here's the script:

#!/usr/bin/env bash
# Filename: ~/tmux-windowswap
# Function that provides improved window-swapping functionality for tmux
maxwin="$(tmux list-windows | cut -d: -f1 | sort -nr | head -n1)"
minwin="$(tmux list-windows | cut -d: -f1 | sort -n | head -n1)"
# Error checking
if [[ -z $2 ]]; then
  echo "Error: No window specified."
elif [[ ! $2 =~ ^-?[0-9]+$ ]]; then
  echo "Error: Bad window number specified."
# Bigger than everything; slide it to the far right, then renumber
elif [[ $2 -gt $maxwin ]]; then
  i=0 # intialize
  tmux move-window -t:$(($maxwin+1))
  winlist="$(tmux list-windows | cut -d: -f1 | xargs)"
  for n in $winlist; do
    i=$(($i+1)) # increment
    tmux move-window -s:$n -t:$i
  done
# Smaller than everything; slide it to the far left, then renumber
elif [[ $2 -lt $minwin ]]; then
  tmux move-window -t:0
  winlist=($(tmux list-windows | cut -d: -f1 | xargs | rev))
  i=${#winlist[@]} # initialize; start at highest indexed window
  for n in ${winlist[@]}; do
    tmux move-window -s:$n -t:$i
    i=$(($i-1)) # decrement
  done
# In-between; just a simple swap
else
  tmux swap-window -t:$2
fi

Then, just add this simple key-binding to your .tmux.conf:

bind m command -p "Send window to:"  "run -b '~/tmux-windowswap #I %1'"

Note: To perfectly mimick screen window-swapping behavior, I believe when you move a window to an existing window number, it should take that window's place and all the other windows are nudged to the right. It would be fairly simple to modify this script to do so.