Using the Tab key in windows which create or alter objects is not very intuitive. Take the following example:
1. In the Object Explorer, click on Login, and click to create a new login.
2. The cursor starts at Name field.
3. After you enter a name, press Tab. It highlights the elipse icon.
4. Press tab again, then it highlights the OK button.
5. After that it goes to the Cancel button, then the Help button.
6. After that it seems to disappear.
7. After that it goes to the "General" category on the far left.
8. Pressing Tab again, you end up at Authentication type.
9. If you chance authentication type to SQL Authentication, pressing tab does not take you to the password field, rather takes you to the OK button then back to Name field.
This is not a good design, it jumps around too much, and should be redesigned.