# Locking, Group Summary Grid Example with grouped headers and docked summary

It is not possible to lock all columns using the user interface. The unlocked side must always contain at least one column.

This illustrates configuring the lockable grid with a non-default layout. The two grids below are managed by a border layout.

Note that the js is not minified so it is readable. See locking-grp-summary-grp-hdrs-grid.js.