Split Pane Borders

TermSurf’s Ghostboard fork adds configuration for split pane borders on top of what Ghostty provides: you can outline split panes with colored borders and fade unfocused panes, so the active pane is always obvious. These options don’t exist in upstream Ghostty — they’re part of the fork.

Options

Option	Effect
`focused-split-border-color`	Border color of the focused split. Unset (the default) draws no border. Hex (`#RRGGBB` or `RRGGBB`) or a named X11 color.
`unfocused-split-border-color`	Border color of unfocused splits. Unset draws no border. Same color formats.
`split-border-width`	Border width in points. `0` (the default) disables borders; values are clamped to the range `0`–`10`.
`unfocused-split-saturation`	Color saturation of unfocused splits: `1.0` is full color, `0.0` is grayscale (clamped `0`–`1`). Only applies in a split layout.

Set a focused and/or unfocused border color along with a non-zero width to outline panes, and lower unfocused-split-saturation to visually push inactive panes back.

# ~/.config/termsurf/config
focused-split-border-color = #7aa2f7
unfocused-split-border-color = #3b4261
split-border-width = 2
unfocused-split-saturation = 0.6

For the authoritative, generated text of each option, see the config reference (for example,

split-border-width

), and the configuration guide for where the config file lives. These split-border options sit alongside the terminal features TermSurf inherits from Ghostty — see Features.