Select All Siblings Command
Use the Select All Siblings command from the Controls menu to deselect all currently selected controls and select all immediate children of the parent control; for example, to move a block of controls to another parent, reposition a block of controls, or change properties on a group of controls.
This command is enabled only if a control is currently selected and the parent of the control has children other than the currently selected control.
2018.0.01 and higher