Hi
Go to monitor> Variable> Signal> type "$softp_end[4]". this will show the software limit setting in the positive direction for A4 (for example current value is 180 change new value to 185). You can modify value if you require, just be sure that it is before the physical hard stops.
you can then repeat this for $softn_end[4] for the axis travel in the negative direction A4 (for example if current value is -20 change new value to - 180). And just change the number inside the bracket for other axis. May be this helps