give a hint when press prefix key in tmux

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The development version of tmux has support for this, so the next release (1.8?) should also support it.

There have been two changes that can be combined to indicate in your status line whether a prefix key has been pressed:

  • You can include the extended “format” replacements in the values of the “status” options. These replacements were first available in tmux 1.6, but they were not previously usable in the status options.
  • The client_prefix format replacement was added.

You could add a (conditional) highlighted <Prefix> string before the default status-right like this:

set -g status-right ' #{?client_prefix,#[reverse]<Prefix>#[noreverse] ,}"#{=21:pane_title}" %H:%M %d-%b-%y'

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