To re-position a descriptor, select the descriptor and drag it to the new position. If you press ALT + left mouse button when selecting the descriptor, all displayed elements of the descriptor will be selected.
You can also use the Up, Down, Left and Right on your keyboard to move the selected descriptors.
To re-size a descriptor, select the descriptor with the mouse and drag one of the vertices of the selection marking the descriptor.
If you have selected multiple descriptors, all will be re-sized.
To select multiple descriptors, click and hold the left mouse button and select the descriptors you want to move.
To select multiple descriptors including all displayed descriptor elements, press click the descriptor while pressing ALT + SHIFT buttons.
See Also
Adjust descriptor size and position using the Position and Size Toolbar
Adjust descriptor position and size using the Property Table Viewer