Tmux is one of the most useful tool when it comes to using using a linux terminal.

Tmux is a terminal multiplexer, it allows a user to access multiple terminals (or windows), each running a separate program, while providing a single screen to work on. Tmux is useful for running more than one command-line program at the same time, increasing productivity and the way you work.

Let's say you have already created one or more tmux sessions, with several windows and panes. We will discuss how you can convert a pane to a window. This can help you organize your windows better.

Join 2 tmux windows to one, creating 2 panes

Let's consider the case where you are inside your tmux window. Let's say you have 2 tmux windows - 1 and 2. When you want to merge the 2 windows, to merge all the panes together of these 2 windows, you can run the following command-

Prefix
:
join-pane -s 2 -t 1

By default the prefix is Ctrl-B, so to merge tmux window 2 to tmux window 1 you can run the following command-

Ctrl-B
:
join-pane -s 2 -t 1

NOTE: You can also split the panes to multiple windows, this will help in organizing panes or separating them logically.

I hope you found this article useful, glad that you found it easy to merge 2 windows in tmux to a single tmux window. You can also check out the complete tmux cheatsheet of keyboard shortcuts and mouse shortcuts.