Reprojecting your data allows you to match the coordinate systems of all your data. For information on how to do this and which coordinate systems to choose, see the tutorial below.
To reproject your data, you'll need to use ArcGIS Pro. To open the current map layers, use the button below.
Reducing the amount of data in your map doesn't mean reducing it's impact. Why not check out our free online cartography course to get the most from your map while keeping data volumes down.
The Map Viewer applies scale thresholds to improve efficiency and performance at different zoom levels without impacting how your map looks. Eco Assistant can further improve efficiency by swapping layers for more generalised versions as you zoom out.