You can use the ribbon command Insert | group Objects | Form object | Checkbox frame to insert a checkbox frame.

Checkbox frames are used and function in the same way as checkboxes. For more information, see previous section.

The difference: A checkbox frame, like all types of frames, has a fixed position on the page. Thus, it does not move when you add or remove body text above it. The normal body text is automatically wrapped around the frame's border lines – it flows "around" the frame.