For compatibility with the MTX keyboard, the editing keys used in BASIC5 have been modified as listed below:

Up and Home – Move to the start of the line
Down and EOL – Move to the end of the line
Ctrl X – Clear everything Left
Ctrl C and BRK - Delete Left
DEL – Delete the Character under the Cursor
INS – Toggle insert/Overtype
Left and BS – Cursor left
Right – Cursor right