Some sizing and alignment subcommands cannot be selected if you have not selected a group of two or more controls (that is, they are disabled). All alignments are relative to the whole form unless you have selected controls within a container control, in which case alignments are relative to the container. For details, see "Adding Container Controls", earlier in this chapter.

Some alignment commands require you to select a group of controls. In those commands that align relative to a master control, the last control that you select in a group becomes the master. The master control is displayed with sizing handles.

You can use the Undo Last Layout command from the Edit menu to undo the last command that you actioned.