How to Insert or Delete Comment Block in ABAP Editor

Insert Comment
Select the statement line as block by hi-light and select menu Utilities -> Block/buffer -> Insert comment * in table control mode) or use hot key Ctrl + < in textedit control mode.

Delete Comment
Select the statement line as block by hi-light and select menu Utilities -> Block/buffer -> Delete comment * in table control mode) or use hot key Ctrl + > in textedit control mode.