In the main window, select View | Configuration, or click the Configuration button: 
on the toolbar, and select the Startup tab.
Set the required options as described in the following:
Set the startup behavior when you want to configure the way the Merge Tool behaves as default when you first open it.
To set the startup behavior:
In the main window, select View | Configuration, or click the Configuration button: on the toolbar, and select the Startup tab.
Set the required options as described in the following:
To automatically insert all of the differences into the target, select Auto Merge. This means that all differences apart from conflicts will be inserted into the target as soon as you start the merge.
To be required to manually insert differences into the target, deselect Auto Merge. This means you will be required to manually select all the differences you want to include in the target.
To save all window positions automatically on exit, select the Save Window Positions on Exit check box. This means that the positions of the windows will be retained the next time you start the Merge Tool.
To have the Derivative Frame window automatically resized, select AutoResize (Frame Contents).
To display the Target, Ancestor, or Consolidated View windows when the merge starts, select the corresponding Show check box.
To choose how the Target, Ancestor, or Consolidated View Windows will be displayed when the merge starts, make sure you have selected the corresponding Show check box, and select minimized, maximized, or restored from the list.
To choose how the Derivative Frame window will be displayed when the merge starts, select minimized, maximized, or restored from the list.
To include the Ancestor file or the Consolidated View within the Derivative Frame window, select the corresponding Include check box.
To display the Ancestor file or the Consolidated View within the Derivative Frame window when the merge starts, select the corresponding Show check box. If the corresponding Show option is not selected, they will not be displayed until you click the appropriate toolbar button: Display Ancestor in Frame: 
or Display Consolidated in Frame:
To choose how the Merge Tool main window will be displayed when the Merge Tool is started, select minimized, maximized, or restored from the list.
Related Topics
Setting the Merge Tool Options