The MAKE_DELETE menu block is here to support your manual modeling of molecules either by allowing you to create or delete covalent BONDS (MAKE_BON, DELE_BON), manipulate the pair list (MAKE_PAIR, INIT_PAIR, PAIR_D_?) and on it based energy distance constrains (ENE_PAIR), create atoms in space (MAKE_ATO) and delete atoms included in the key 'active' (DELE_ACT).
> JOIN atom-num1 atom-num2
A covalent BOND between the last 2 PICKED atoms is formed.
> make atom coordinate 3*real > image color 222 select atom number natom end atom cross
MAKES an ATOM with the name X at the current image CENTER position and displays it as a CROSS.
> make pair $2 $1 > define pair force force_pair pair dist 0.0 - > select atom number #2 $1 end
MAKES a PAIR from the last 2 PICKED atoms and defines a distance constraint between them.
> DELETE BOND atom-num1 atom-num2
A covalent BOND between the last 2 PICKED atoms can be DELETED or created (JOIN).
> delete atom select active end
DELETES current 'active' selection. You must confirm the deletion.
> make pair init
INITIALIZES the pair list by the setting pair counter to 0.
> inquire PAIR_DIST "DISTANCE:" > make pair atom-num1 atom-num2 > define pair force force_pair pair dist 0.0 - > select atom number atom-num1 atom-num2 end
Asks for the target distance (PAIR_DIST) and MAKES a PAIR from the last 2 PICKED atoms and defines a distance constraint between them.