Tracing a Shape in a Vector Layer...

[handrawn]

Hi Tom

I only have PSP9 and I realise things may have moved on as you have X3 ['PSP13']...

In version 9 using the pen tool on vector layer you can join by going into edit mode [on the info bar] click on one end node and drag over the other until you see 'join' - however it may be different for X3

Why do you want to join them? - to fill in a vector layer for example in version 9 it has to rasterised and then as long as it overlaps you are ok, overlapped raster lines are joined by definition
[again that might be different in your version]