-How may I determine what the point of intersection between two lines, lines and surfaces and two surfaces are, instantly (I want something better than using the distance Measure tool and
my on triangulation), even when a line of intersection is a curve of some kind? How may I use a "snap to" intersection detection tool, for when there is no vertex at the location of intersection? Can this intersection tool create a specific point at the location of intersection for me?

-How do I convert between Grease pencil and a path (or series of paths) or bezier, and vice versa? Particularly when one edge is part of a plane or solid already,
and I wish to update one of these already, in place (hoping that this edit in place is possible)?  I particularly seek such a point generating intersection tool if my next question doesn't have an addon implementation either.

-How may I use the knife tool to do curve cuts, and not just straight lines?

Not a 100% sure if this link might help answer some of your questions Precision work in Blender but there was an extenisve list with more information in each subject and there was one about mid point in the list Show edge lengths which I think might help at least with one of your questions I do hope that it helps answer your questions.   

No no, and thank you.  I have had my 3 questions all answered.

The key is adding a boolean modifier on both objects, and doing intersections

and things via that.

I do note that there are a whole bunch of modifier options.  For example,

When I leave an object's edit mode, and click build, it just sends the object away.

What does the build modifier do?

Quote - No no, and thank you.  I have had my 3 questions all answered.

The key is adding a boolean modifier on both objects, and doing intersections

and things via that.

 

I do note that there are a whole bunch of modifier options.  For example,

When I leave an object's edit mode, and click build, it just sends the object away.

What does the build modifier do?

Build allows you to animate an object being 'built,' or generated over time. The reason it is no longer visible when added to the modifiers stack is due to the playhead being at the beginning of the action.

There are 3 tasks that my exercises and viewing of tutorial videos havn't helped much on. Could someone just reply with practical answers, if possible?

-What do I actually do to get bsurfaces generating between two Grease Pencil lines?
I can put down a plane and get the bsurfaces menu to show in the area, but it hangs whenever I get it to go and or does nothing. How do I get it to run and give me the resultant grid, with the new options thereafter?

-What is the keyboard shortcut for subdivisions on a path? How may I select all subdivisions on a path?

-How do I turn a straight, individual path into a bezier, as well as in place too? How may I turn an individual straight path, composite paths, and beziers into a grease pencil line, in reverse (would need to for bsurfaces and other options)? Otherwise what would you do with aid in drawing nicer grease pencil lines?

-Don't worry about my bsurfaces question, since I have got layers and bsurfaces all working as desired.  My problem now pertains to lines.  To help with my modelling, and to provide me with all desired options, I need 2 things now:

-If I have a path which is a series of straight line, in edit mode, how may I select a desired cross segment of multiple sub paths, all all paths at once?

-How may I convert an already drawn straight line path into a bezier curve, with its dual end handles to help with curvature?  Mainly, how do I convert an individual or multiple "path path",
or a bezier curve, or a combination of the two latter curves, into a Grease Pencil curve?  I would need to go from paths or beziers to bsurfaces, since I need the special handle assistance to give me better precision for curves that Grease Pencil gives me when drawing with it.

Can someone tell me what to do with these, please?

How may I edit or delete my previous posts, and not just my most recent unanswered ones?

The previous, more recent questions here I have answers for, allowing this thread to be regarded as pretty answered and finished.

Once the thread has started and replies have been made you can nott delete the thread since it has replies. if you wish no further answers on this thread I can lock the thread and there will be no further abilities to reply or post to this thread. But deleting just portions of it is not possible.