A linetype defines a line's characteristics. A line (and many other entities) can consist of combinations of dashes, dots, spaces and symbols defined by a linetype file. gCADPlus allows users to load AutoCAD linetype files. These files are simple text files have the extension .lin.
It is often the case that even though and entity has a linetype style associated with it, the pattern does not show. All you may see is a continuous line even though the pattern may be (say) dots. This is because the linetype scale is not set appropriately. It is not possible for us to second guess the size of your design. If the linetype pattern does not show, experiment with different values for the linetype scale.
New entity linetype
AutoCAD linetype files
Basic linetype files
By default, the metric version of gCADplus should load the file acadiso.lin and the Imperial version acad.lin. Both linetype files should be available to you no matter which version you use.
The figure below shows the linetypes available when a linetype file called acadiso.lin is loaded.
The image below shows an example where a polyline, with a dot pattern associated with it, has been used to define some paths through some bushland.