Multiple textures / meshes

I, I have tried the export (says me if i’m wrong wause I test it once and don’t take note at this moment) in multiple mesh but when I réimport each part it’s not a logical division of the global mesh (ex : first part is in the middle, the second is the firt at right, etc). Could it be possible to choose the way the division is made or to visualise it on the screen (sequoia does this for example with their hacksaw option). If RC already soes it, I didn’t find the option, could it be possible, in this case, to explain how to configure it ?

Many thks