Hello RiaanP:
On Unix/Linux, terminal emulation must be configured in order for the borders and line-drawing to work. The configuration depends on which terminal emulator you are using.
Set the environment variable TERM to an appropriate value in the environment of the user (for example in the user's .profile), and also make appropriate settings in the terminal emulator's configuration. Here is a link into the documentation:
documentation.microfocus.com/.../GUID-F5E9CB1E-242E-4FD6-A2CF-BA121856063A.html
Here is a documentation link to the general topic of the Terminfo Database and Terminal Devices on UNIX/Linux:
documentation.microfocus.com/.../BKCYCYTERM.html
Let me know whether these suggestions work. If not, open a support incident through your login at supportline.microfocus.com. Specify the version of Visual COBOL you are using, and the version of UNIX/Linux, and the particular terminal emulator.