Click Merge Clouds
in the Operations toolbar. The Clouds Union dialog
Select the clouds you want to merge. The list in the
dialog box is updated.
To remove a cloud from the list of clouds to merge, make
its name active in the list and click Remove.
To replace a cloud in the list of clouds to merge, remove
it, then select a new cloud.
Once you have selected all clouds to be merged, click
OK. A new cloud is created.