I closed the window that sees all tables, procedures, packages, users, etc.
I couldn't find where to restore the windows, can someone help?
I am using version 14.0.1.1965
I think you need to toggle Object Browser
in Tools
window in order to see the window displaying tables, procedures etc. Moreover, the Window List
located at the left bottom corner is also activated from the same menu also.
This picture is taken from the version 11.0.2.1766
: