Insert a new line above the currently selected one in forms where the
function can be found in wizards menu (see
insert document lines). Where you can find the
function in wizards you can also call it up by pressing the 
key combination.
Before insterting the line, you have to confirm the operation:

All lines BELOW the currently selected one are renumbered when clicking
, and a
new one is inserted right ABOVE it.
Cancel the procedure by clicking
.