You can use grids to line up form fields and objects (including text, image, path, and shading objects) in a PDF document. When you create or move a form field or object, Snap to Grid can align the form field or object with the nearest grid line.
To show or hide the grid, navigate to View > View Setting > Page Display > check/uncheck Grid.
To turn on or off the Snap to Grid option, navigate to View > View Setting > Page Display > check/uncheck Snap to Grid.
You can also customize the grid appearance from File > Preferences > Layout Grid.