Activating the grid means that template objects will be aligned or "snapped" to grid points when they are added to the template.
To activate the grid right-click in an empty area in the Workarea and click on the pop-up menu.
The check mark in front of the option indicates that the grid is activated.
You can also activate the grid by clicking the Snap check box in the Grid Settings toolbar.
If you have drawn or added template objects before activating the grid, you can align them to the active grid later on.
See also
Aligning template objects to the grid
Showing or hiding the grid in Template Editor