Editing form objects is not very different from editing other types of objects (see Objects).
There is, however, one important difference:
Important: Form objects cannot be selected with a left-click by the mouse. To select a form object, click on it with the right mouse button.
Alternatively, you can also use the View | Object mode 
ribbon command to switch to Object mode, in which form objects can also be selected by left-clicking.
Once you have selected a form object, you can edit it like any other type of object – for example, move it with the mouse, change its size, etc.
By right-clicking the mouse on the form object, you can modify its properties with the entry Form object: Properties in the context menu .
For more information about the properties of form objects, see Form objects in detail.