Utilities | Format Selected Sequence
This submenu presents four other menu items that offer some common ways of reformatting text.
Merge Multiple Lines: This is used to merge several separate lines into one long (very wide) line
Remove Spaces/Digits: This is used to remove spaces and digits from a genetic sequence.
Insert Spaces Every 3: This is used to break the selected text into three-character chunks (e.g., codons). Note that it does not remove any already existing spaces.
Insert Spaces Every 10: This is used to break the selected text into ten-character chunks.