I'm really confused by this. ArcMap will seeminly randomly decide to not allow snapping when editing. Sometimes its only for certain features, sometimes for only parts of the same feature (e.g. one end of a line but not the other, or not along a part of the line). Now its just flat out not letting me snap to anything (yes, snapping is turned on with all options on). Any hints on this one?
There are several steps I use.
- Ensure you are Data View NOT in Layout View (thanks MW)
- is easiest but don't necessarily try it second. copy the layer you need to edit, snap to and use for reference (as few as possible) to another document (for editing).
- make sure you don't have a definition query.
What Brad said (especially make sure you're in data view - focus your data frame or edit in data view rather than layout).
You can also tighten your snapping tolerance. Under the snapping drop down arrow, select "options". Change the number value shown in my printscreen below. Sometimes this works for me. I've seen instances where this seems to refresh my snapping capability. Usually, I just don't have my data frame focussed though.
I had this "no snapping" problem, and the eternal blue circle pause when trying to edit. I had a huge file of contours on my map which were in a different projection than the map. I got the warning whenever I turned on editing, but I just ignored it. When I turned off the contours, suddenly snapping and editing worked fine!
An MXD that snapped yesterday might not snap today. That is why I sometimes revert to Classic Snapping.
Mike's simple answer (for which he was chided) provided the best clue for my problem today. I didn't want to remove occurrences of my line data because the symbology varied. So, I tried moving the layer I was editing higher in the Table of Contents and classic snapping worked.
Try this to see if the layer you are snapping to is recognized by ArcMap. Use Classic Snapping. Then open the Snapping Window to see if that layer is listed. If not, move it higher in the TOC.
I had an issue where the editor would not even select a certain point feature. I would have to select it with the "Select Feature" tool and then it could be moved but it would still not snap to the line feature.
Not sure why this worked but I turned on a different point feature and was able to select it with the editor and could snap it. When I went back to the orginial feature I wanted to snap it worked.