The Describe Companion is an easy to use tool to have a quick look at your tables and views - it lists the table or view columns, including datatype descriptions, NULL-ability, defaults and Primary Key columns.
You can drag any columns from the list and drop them in any code editor. If you drag multiple columns, Database Workbench will insert "," between the columns and add "new-lines" into the editors - this setting can be changed from the Preferences.
You can press CTRL+SHIFT+D in any code editor to display the table under the cursor in the editor. This is a very fast way to display all columns in a table without having to reach for the mouse.
The Describe Companion