Compress/Uncompress

This command changes the cursor to the 'Compress/Uncompress' icon.  If you click on an interior branch A branch is a line connecting either two internal nodes to each other or an external node to an internal node in a phylogenetic tree. The length of a branch denotes the genetic distance (e.g., number of substitutions per unit time) between the two taxa it connects., MEGA will prompt you to give a name to the group that will be formed.  It then will compress all the lineages defined by this branch A branch is a line connecting either two internal nodes to each other or an external node to an internal node in a phylogenetic tree. The length of a branch denotes the genetic distance (e.g., number of substitutions per unit time) between the two taxa it connects. into a solid elongated triangle whose thickness is proportional to the number of taxa A taxon is the individual unit whose evolutionary relationship is being investigated. Depending on the study, “taxa” may refer to species, populations, individuals, or sequences within an individual.RH_Taxa condensed. Clicking on the branch A branch is a line connecting either two internal nodes to each other or an external node to an internal node in a phylogenetic tree. The length of a branch denotes the genetic distance (e.g., number of substitutions per unit time) between the two taxa it connects. again will uncompress it.

The cursor may be reverted to the arrow by clicking on the arrow icon on the left hand side of the Tree ExplorerHC_Tree_Explorer.