Right side of my screen is occupied by an autopopping applications launch buttons list, so using right-aligned palette isn't desirable for me. Bottom-aligned configuration eats vertical space, makes it harder to work with vertical sheets.
Here's a trick I've 'discovered'.
Undock a palette to make it float, move it to the very top of the screen, change its dimensions to one horizontal row, then find a spot near its left-bottom border that allows dragging the window and move it so that palette's minititle isn't visible.
Now whenever you click palette's dropdown icon you see the whole palette