Sorry, I should have clarified that I meant it would be easier to use a table instead.

What you have look like text frames. To verify this, right-click a border and see if the right-click (context) menu says Format Frame. If you click the command, you get a dialog box that lets you resize the frame, or you can use drag and drop.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional