You can move any tab anywhere you want on either screen.
You can also save the arrangement (up to 10 of them) as a preset.
Here’s what the Help file says about this feature:
Save a window layout
Arrange the windows and docked windows as desired.
** Press Ctrl+Alt+D, release the keys, and then press a number on your keyboard (not the numeric keypad) to save the layout in that space.
From the View menu, choose Window Layouts, and then choose Save Layout As from the submenu. The Save Layout As dialog is displayed.
Choose Save Layout from the submenu if you want to update the current window layout. A bullet () is displayed next to the current layout.
In the Name box, type the name you want to use to identify the layout. This name will be used in the Organize Layouts dialog.
Choose a setting from the Shortcut drop-down list to set the shortcut that will be used to load the layout.
For example, if you choose 4, you could press Alt+D, release the keys, and then press 4 on your keyboard to load the layout.
The Folder box displays the path to the folder where the layout will be saved.
Window layouts are saved in the following folder by default: C:\Documents and Settings\\Local Settings\Application Data\Sony\Vegas\7.0\. You can click the Browse button to choose a different folder.
Click OK to save the new layout.
Load a saved layout
From the View menu, choose Window Layouts, and then choose the window layout you want to use from the submenu.
** To load a layout quickly, press Alt+D, release the keys, and then press a number on your keyboard (not the numeric keypad) to recall the layout saved in that in that space.
If you’ve modified the current window layout, choose Window Layouts, and then choose Reload Selected Layout from the submenu to reset the window layout to the last-saved version.