I'm looking for some very basic information. I need to understand what exactly is import/export and its process. I assume that it is similar to upload/download. I have tried to export once and didn't get anywhere. Where or what would be a good video/wiki page/document that would walk me through the process and includes the basic, simple explanation. I believe that most manuals don't delve this deep, that most of this experience, the cad forums/products etc. assume the user already has. I don't.
Hi, and welcome to the forum. The import and export functions serve similar, but different, purposes. The import function is used to place an image (jpeg, bmp, gif, etc.) into your drawing. It is also used to place a block in the drawing. A block can be a drawing of an often used item, such as a bolt, that can read into any of your drawings.
The export feature saves your drawing as an image (jpeg, bmp, gif...) or as a PDF. I have never had a need to use either the import nor the export. Neither has any relation to upload/download.
In a nutshell, here's how I use the import function:
I use it to import HVAC, plumbing, architectural drawings into LibreCAD.
Then I can draw over top of the original drawing to show changes to the ductwork, piping layout, walls, etc.
For instance: I obtain a pdf of the original drawing - usually supplied to me by an engineer or architect. I then convert the pdf to a bmp image. I import the bmp image into LibreCAD and then I can draw over the architects' original drawing to indicate changes or highlight areas of concern. Then export as a pdf and send the drawing back to the architect.