You might know about this already but my feeling is that lots of people are not aware of the reasons why drawing on the defpoints layer might not be a good thing to do. I know it's tempting to use the defpoints layer for construction lines, notes to other team members, etc due to the fact that the defpoints layer doesn't plot - but the downside of doing so might not be worth it.
What is the defpoints layer?
The defpoints layer is created automatically by AutoCAD when you create dimensions and contains the definition points of these dimensions. I'm not sure exactly what these definition points are but I know from experience that drawing on the defpoints layer can be bad news.
What is the problem with drawing on the defpoints layer?
There are two main reasons why using the defpoints layer is a bad idea:
One. If layer zero gets frozen then everything that is on the defpoints layer is unable to be selected. This might not seem like much but if you're not aware of it you can waste lots of time trying to work out why you can't select anything on the defpoints layer. Not to mention if you are working in a team and someone else will be using your drawing it can be even more confusing for them.
Two. If you run the AUDIT command this will create a new layer called $AUDIT-BAD-LAYER and put everything that was on the defpoints layer onto this new layer. The previously non-plotting objects will now plot as they are not on a no-plot layer anymore - see this link for more information.
So... what is the best way to handle this?
The best practise is to create your own no plot layer, or series of no plot layers, and this will ensure that you don't have to worry about this happening. It will also make your other team members happy.
That's all for this tip. How does your office treat the defpoints layer? Leave a comment below and let us know how your office treats the defpoints layer. Thanks!
Also appeared on CADsmarter