One possibility - there is an object very far from your sketch - typically if you use PocketTopo and forget switch pen to arrow still in sketch editor mode and manipulation with Pocket PC will generates random lines. You may check it down in the right side menu in section Drawing area. 

Select object after object and check its coordinates or coordinates of points of line in right menu in sections Point control or Line control. 

The fastest way could be check your .th2 file in plain text editor, find such object/s and manually delete the strange points with huge coordinates.

Martin






1. 10. 2019 v 5:43, dennis mitchell <denmit81@gmail.com>:

Hello I have a scrap I'm trying to work on. When opened in the .th2 editor it shows objects in the object box but the drawing screen is blank. 
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