Four editing modes are available:
- Insert a single gap and shift the first non-gapped block or the rest of the sequence to the right.
- Insert gaps column-wise and shift the first non-gapped block or the rest of the sequences to the right.
- Delete a single gap and shift the first non-gapped block or the rest of the sequence to the left.
- Delete gaps column-wise and shift the first non-gapped block or the rest of the sequences to the left.
These editing modes are chosen from the edit-option panel as shown in Figure 1B.
Each of these modes is explained in detail below.