Thank you all for the responses and helpful information.
I used the Styles window suggestion to find a plane that was not closing. Of course, it worked! Knowing this tool is there is quite helpful.
I changed the ‘to within tolerance’ option. It was ‘on’. I’m sure this will help with my line ‘jumping’ problems.
Lastly, for krupster51: My video card is an NVIDIA GeForce 9500GT. I’ve had it for a few years, now. Is this not a sufficient card for SU? I’m running it on an ECS Z77H2-A3 mobo with an Intel Corei5 3570K 3.4 GHz chipset and 16 GB or RAM and about 8TB of disk storage. Here is a screenshot of what Speccy says about my video card:
Can you tell me what functions are not adequate and what features I should shop for in a replacement card?
TIA
rh