# tui/dock-back
Dock a popped-out panel back into the workspace grid (split off the focused panel). Counterpart of `tui/pop-out`.
## Syntax
[tui/dock-back] [tui/dock-back ?panel-id-or-tag]
## Parameters
- `panel-id-or-tag` — number id or string tag (optional, default: the calling panel)
## Examples
[tui/dock-back] # re-attach this popped window to the grid
## Returns
bool — true when the dock request was queued for the host main loop. False when no workspace is attached, pop-out is unavailable on the host (`retra`, `hydra`), the target can't be resolved, or the panel is not currently popped. Docking moves the app thread and identity onto a fresh grid leaf, rebinding the panel id — cached ids behave like a minimize/undock cycle.
## See Also
`tui/pop-out`, `tui/split`, `tui/close`