I'm having a hard time seeing the DRC error markers. They are very small sometimes.

If there are DRC errors, then the DRC error count should show up at the top of the layout window. If there are errors, then the best way to find them is to use

drc find

, which will zoom to the next DRC error. There is a convenience option

drc find <text>

which will jump to the next DRC error message containing the text

<text>

. Putting a cursor box around the entire layout and issuing the command

drc why

will give a list of all the DRC errors found inside that area (without details; to see each error, again, use

drc find

).

Thanks.