How do I configure TOAD for Oracle 12.1 to force UPPERCASE on the keywords.
Your best best is to configure the formatter to format the case as you want it. If you do not want to format the layout of your code you can format applying case changes only.
The other way is less efficient, especially on large text and when pasting, but on the View|Options|Editor|Behavior options page click the Syntax Highlighting button. Select “Reserved word” and change the “Capitalization effect” to uppercase.