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SQL Developer provides a number of customization features that enable users to specify their requirements for keyboard usage, display attributes of SQL Developer, and timing where appropriate. All customization features are organized within the Preferences dialog. For maximum usability and to accommodate your needs, you should consider changing any of the following from the defaults to a more usable customized setting.
You can add and change the default accelerator keys for Oracle SQL Developer in the Tools > Preferences > Shortcut Keys page. You can also load preset keymaps that you are accustomed to using.
In addition to changing the mapped accelerator keys, you can pass a conflicting accelerator key to JAWS by preceding the accelerator key combination with Insert+F3.
You can change the default look and feel for Oracle SQL Developer in the Tools > Preferences > Environment page. The look and feel determines the display colors and shapes of objects like menus and buttons.
You can change the font and font size that display in editors in the Tools > Preferences > Code Editor > Fonts page.
You can change the font style, as well as the foreground and background colors used in syntax highlighting within the source editor in the Tools > Preferences > Code Editor > PL/SQL Syntax Colors page.
You can display or hide line numbers in the source editor in the Tools > Preferences > Code Editor > Line Gutter page.