In Toad 3.2, I can type "SELECT <table>." and get the pick list of the table column to show up but in Toad 4.1 this no longer happens.
1. Type in "SELECT FROM <table>"
2. User your mouse or key board and move the cursor between the SELECT and FROM key words
SELECT | FROM <table>
3. Press CTRL key + period key and the table column drop down will be displayed