i had a situation at work where i wanted to edit two files that were very similar. i could have used a macro on one file and applied it to the other. but i thought there must be a better way. so i searched if tmux could sync input between panes and sure enough it can.
the command to sync text is:
:setw synchronize-panes
run the same command again to untoggle the synchronize mode.
that blog also mentions it can be useful to ssh into multiple systems that share a similar structure.
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