Add this to your tmux.conf:
set -g status-left "#[fg=white,bold]#?client_prefix, , #[fg=white,bold] #S "
With the patched font, you can replace those ASCII # symbols with actual geometric triangles.
Most terminal emulators default to "Regular" weight, which can look thin on high-DPI (4K/Retina) monitors. The Bold variant of Berman provides: berman bold font patched
The problem? The standard Bold Berman font lacks icons, powerline symbols (those cool arrows separating your Git branch from the path), and programming ligatures.
Authentic patched versions are typically shared via: Add this to your tmux
Because "patched" fonts are modified executables, you must download them from reputable sources to avoid malware.
Safe sources for Berman Bold Font Patched: With the patched font, you can replace those
Avoid: Random "font aggregator" websites that bundle executables with adware.