I'm working in ArcMap 10.3.0.4322 on a Basic license. I have two tables open in a map created from a Blank Map template yesterday. One table was created from a .CSV file (Display XY data, then Export to shapefile. Added the shapefile to the map then removed the sources). The second is a TIGER roads shapefile.
After a few minutes of work, the cursor changed to the Zoom Out tool (I didn't notice when; I may have done it). It will not change to Zoom In or Pan when I select one of them from the Tools toolbar. I can zoom in if I hold down Z, but the cursor changes back to Zoom Out when I let the key go.
I saved the map, closed ArcMap and reopened it. The cursor shows Zoom Out from the start.
Has anyone else seen this? Might there be a customization option I clicked by mistake, or is this a bug?