An ArcGIS user adds two feature classes with different coordinate systems in ArcMap. one at a time. The user starts editing data from the second feature class and is warned about editing the feature class because the coordinate system is different from the data frame.
Where do the edits occur?

A layer tiding simple symbology is causing slow drawing performance at a scale where analysis needs to be conducted. Only certain features from this layer are necessary in order for analysis to be completed by the ArcGlS user What can the user do to increase drawing performance?