Arrange panes and resize windows

Select native $window and $pane handles with fGet-TmuxWindow and fGet-TmuxPane. Layout and size changes support -WhatIf and -Confirm. Without -PassThru, they emit no success output. With it, they return a native replacement handle; previously captured objects remain unchanged.

Give a window explicit dimensions in cells:

$window | Set-TmuxWindowSize -Width 120 -Height 40 -PassThru

At least one dimension is required. Resizing switches window-size to manual, so the window stops following its clients. Alternatively, use -Direction Right -Adjustment 5 to grow an edge, or -Mode Expand / kShrink to use the largest / smallest attached client. These forms are mutually exclusive.

Arrange existing panes side by side:

$window | Set-TmuxLayout -Layout 'even-horizontal' -PassThru

Other presets include even-vertical, main-horizontal, main-vertical and tiled. Unambiguous prefixes are accepted; unknown or ambiguous names fail before dispatch. Use -Mode Next, kPrevious or kSpread instead of -Layout to cycle layouts or spread panes.

A captured p$window.Layout can be passed back as -Layout. On tmux 3.7 and earlier, restoring its sizes can rotate which pane occupies a position; it does not guarantee pane identity at each position.

Set a pane’s width in a window with a horizontal split:

$pane | Set-TmuxPaneSize -Width '40' -PassThru

Pane dimensions also accept percentages such as '50%'. tmux clamps sizes that do not fit; inspect the replacement handle for the observed dimensions. -Direction with -Adjustment moves a pane edge instead.

Toggle a pane’s zoom:

$pane | Set-TmuxPaneSize -Zoom

Repeating the command turns zoom off. -Zoom cannot be combined with a size or direction. A stale or disappeared target writes a per-target error; -ErrorAction Stop terminates the pipeline. Cancellation does not roll back an already dispatched change.