Sounds dump to some people no doubt...
But how do you convert a pile of lines to form a polygon. For example, if i draw a square out of a pile of lines, then want to Trim the lines to make a box... how does that become a shape rather than a line.
Id then like to extrude the resulting shape...
The next question i have, is once its extruded to say 10mm, and i want to bend one side in to a pentagon from a square, how do i do that to a pre-formed shape. Can i pull shapes about manually?
Squid, I suggest you try the tutorials and register on the Onecnc forum unless you've already done so. There are a lot of really helpful users there and tons of great videos with basics and more advanced stuff.
Quick answer: lines need to be on same plane and fully trimmed before extruding. Smart project is a great tool if your lines are at different z levels. Then just go to the trim tools and use "trim 1" or "trim 2" or one of the other tools. The scissor tool is very good too. You can test your trimming by picking your chain, just indicate a start point, click for direction and hit F3 to complete, if everything is in red you have a fully trimmed string.
Now you can extrude your lines and you'll have your solid. This is my preferred method, of course you can also make a surface from the lines and then extrude that. I'm sorry I don't quite get the second question, do you want a solid that starts out as a square and morphs into a pentagonal top?
If so, you'll need to draw wire frames of the sides, create surfaces and finally merge to solid.