All actions have a maximum range. Only models that are within range of an action may be targeted by the action.
To see if target is within range count the number of squares between the model performing the action and the target model, including the square the target occupies.
If the number is equal to or less than the action´s range the model may be targeted by the action.
If the target is further than the action´s range the model may not be targeted. A different taget must be chosen.