Setting GUI Builder Preferences

Use [Snap To Grid] and [Snap Lines] in the status bar of the GUI Builder window. You can change how controls are managed on the forms in the GUI Builder window design area by setting the GUI Builder preferences.
Click the [Snap To Grid] in the status bar.

When the [Snap To Grid] is selected, GUI Builder shows grid and places the controls on the grid.

To change the size of the grid (distance between dots), right-click the [Snap To Grid] and change the value of [Grid Width].

When the [Snap Lines] is selected, GUI Builder shows line (a) and place controls along the line.