Select the rung number one up from where you want to insert a rung.
Click the icon 
. A rung is inserted below the selected rung number.
Select the rung number one up from where you want to insert a rung.
Click the icon . A rung is inserted below the selected rung number.
You can also insert a rung in any of the following ways.
On the [Logic (L)] menu, select [Insert Row (R)].
Right-click and then click [Insert Rung (R)].
Press CTRL+R.