From our previous Tip #2 you could learn how to move between columns in your table using just arrow keys. Now, we will show you how to use the Down arrow to create one or even more new columns. Probably, this is the fastest way of creating new columns in this part of the galaxy. You really have to learn this.
Open your database model and select the table in which you want to create a new column. Go to the Table properties panel on the right and place the cursor on the last column:
Now, press the Down arrow on your keyboard and a new column will be created:
Press the Down arrow again and another new column will appear in your table:
Knowing that, you can create all columns for your table without even touching a mouse!