By pressing the "F8" (Again)-key, the last replace or delete operation is repeated. For example, to replace all strings 'aaa' by 'bbb' in a text, select the first occurrence of 'aaa', type 'bbb' (to replace it), and then simply press "F8" to let the editor search for the next 'aaa' and perform the replace operation again.

The right-button menu of the edit window also contains an entry called "Again - for All" which repeats the operation until no more occurrences of the string are found.