Warning developers about overwrites
If you make and save changes to a form or global object that is not checked out (to you or anyone else), your changes will be overwritten the next time anyone checks that object out. To help prevent this from happening, you can specify a setting to warn developers, when they open a form in a designer (either the Web Designer or Design Mode) that the form is locked.
To specify this setting, in the dialog box, select the Enforce strict locking of forms and global objects option.
This setting applies only to users with Vendor Developer or Site Developer editing permissions.