why does mouse cursor change to dimension icon in assembly?

I have a question regarding why my mouse cursor changes to a dimension icon in an assembly when hovering over different parts? For example, see picture below. I may be trying to select a face or something to drag it, but the pointer has changed to a dimension icon, so when I click, it drags out a dimension instead of moving the part. Does anyone have any ideas why this might be, or if there are any settings that can be changed to modify this behavior?

SolidworksAssemblies