In the same 'View Modify' menu manager window with the 'View Disp' menu is one called 'X-Section'. If you look at the options under this menu item, you'll see one called 'Flip'. I would try this as this is what I meant by flipping the cut plane arrows. Anyway, this determines whether the cutting action cuts away the front or back of the model. If you cut away the back, you will see the cross section but still be viewing the solid structure of the assembly in front of the section. When you flip it again, you should see the section geometry but not what's behind when view display is set to no hidden.
BTW, Pro/e makes it possible, as a supposed convenience, to create and, to some extent, modify cross sections in drawing mode. I took the detailing course and learned there what a PITA this is. I haven't done a cross section in drawing mode since. I make all my cross sections in part/assembly mode where you have a model to manipulate, where it is much easier to select datums, where it is easier to create datums and sections and even to modify cross hatching (angle, spacing, etc.) By the time you get to Wildfire, you have 'Tools>Model sectioning' which lets you create zones, envelopes and sections, lets you manage and edit them and even create patterned sections, all in the same interface. So, my advice to one and all is to get used, if you don't already do this, to creating/managing sections in part/assembly mode. When the sections exist, you'll be given the list of existing named sections in drawing mode to select from. All you need to make sure of is that the view is placed so that the section is parallel to the screen. If you have a problem with how it is cutting, go back to the model and flip the direction of the cutting action. Any problems will be easier to see and manage in the model.