Field Properties - Common Tab - Anchor¶
This option is only valid for the Studio and can be used to move or resize an object automatically when the section gets changed. The default anchor for any object is "Top," which means nothing will happen when the section is resized.
If the section contains a vertical line object, for example:

and the section is made higher, the line will maintain the same height.

If the anchor was set to "top and bottom" before the resize of the section, the line would be expanded:
