Accessible by keyboard?

In the Key field, when adding a key to a table, you will see an ellipsis button and a lookup button. Both of these buttons can be activated by pressing F6 when they are at their own. But in the above situation the lookup button is activated by pressing F6. Is there any way to activate the ellipsis button by keyboard[?]

Try to press Alt+Down arrow

Try it with Shift + F2.

Alt+Down arrow does the same as F6 but Shift+F2 does the job. Thanks!

Alt+F1 will display the shotcuts available in any given situation.