The Single Window Mode tab allows you to choose the main window size and configure a scroll bar option.

Window Mode Settings Dialog Box, Single Window Mode Tab

Window Size

Select the size of the Xmanager main window. The window size will be the size of the X root window.

Desktop Size opens Xmanager main window as large as the desktop excluding the task bar.

Full Screen opens Xmanager main window to occupy the entire screen, and it has no title bar and sizing border. It will also hide the Windows task bar.

Use Scrollbar

Attaches scroll bars on the right and bottom of the Xmanager main window. It is useful when you want to make Xmanager window size larger than the Windows desktop size.