To merge two annotations, make a right click on the annotation and from the menu that pop-up select either CTRL+A to merge with next annotation and CTRL+B to merge with annotation before. For detailed explanation on merging see the section called “Merging annotations”.
or . You can also use shortcut keysTo split an annotation, make a right click on the annotation at the point where the annotation is to be split into and select the section called “Split Annotations”.
from the menu that pops up. For more information see