Howdo I display all the images from a field in a view?
You see the limited number of values (as a drop-down) in Views instead of a text field where you can type in all or some number because you have limited the number of values this field can take in its settings. 

Check your Content type field settings for "Imagenes" and see if it's limited: 



Since this is in your field settings it's enough to set your Views field multi-settings to 5 because there are never more than five values in this particular case.