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Splits let you view two buffers simultaneously — for example, monitoring #ops and #alerts at the same time. This is different from the main TUI layout (buffer list, nick list, status bar) which is always present.

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/split

/split v|h <buffer>
/split v|h <server>/<buffer>
Split the chat area vertically (v, side-by-side) or horizontally (h, top-bottom). 
/split v #linux          # vertical split with #linux
/split h libera/#ops     # horizontal, cross-server
The “primary” pane shows your current buffer. The “secondary” pane shows the buffer you specify. Use /focus or Alt+Tab to swap which pane receives your input.

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/unsplit

/unsplit
Close the split and return to single buffer view.

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/focus

/focus
Swap keyboard focus between the two panes. Also available via Alt+Tab.

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/layout

Save and restore split configurations: 
/layout save <name>      # save current split as a named layout
/layout load <name>      # restore a saved layout
/layout list             # list saved layouts
/layout delete <name>    # delete a saved layout
Layouts are saved as TOML in ~/.local/share/flume/layouts/.

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Layout File Format

A layout profile is a simple TOML file: 
direction = "vertical"    # "vertical" (side-by-side) or "horizontal" (top-bottom)
primary = "#ops"          # buffer in the left/top pane
secondary = "#alerts"     # buffer in the right/bottom pane
ratio = 50                # percentage of space for the primary pane (1-99)

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Generate a Layout with AI

/generate layout monitoring with #ops on the left and #alerts on the right
This generates a layout profile — it chooses the direction, buffer names, and ratio based on your description. More examples: 
/generate layout side-by-side view of #rust and #python
/generate layout horizontal split with server notices on top and #general below
/generate layout 70/30 split with #main on the left and #logs on the right
/generate layout creates split profiles — it controls which two buffers are shown side-by-side. It does not change the TUI chrome (buffer list panel, nick list, status bar content). Those are configured in config.toml under [ui].