Hi Gabriel,
Thanks for your reply; I'm aware of the option "select object when intersects with selection marquee" in the preferences, which provokes the object to be immediately selected by the selection marque touch, even if it's not fully encompassed.
My point is that objects that are above others cannot be selected without selecting the object bellow if you use the marquee select; to prevent this scenario, you would have to use a "pick select" strategy, clicking in each object...... or start the marquee select on an empty area....which can be time consuming.
In the example bellow, if you start the marquee on the point "I" of the black dotted line, you would end up selecting only the green object. To select the brown ones, you would have to start the marquee in the point "I" of the red dotted line.
My suggestion is to implement the "SHIFT + marquee" (as in INKSCAPE), so you could start the marquee over any object, and the only ones that would be selected are the ones fully encompassed by the final marquee area.