Release Notes #44 (Version: 1.0.8502.23827)

New Functionality:

New "Show All Moves" Command. Press and hold the "M" key to see all of your planned moves displayed on the map.
Airbases can now be built to multiple levels. The number of aircraft that can participate in battle will be limited to the airbase level of the region they are based from. The existing airbase levels on the map have been updated to the new system. For example, if the airbase level is 4 and you have 8 units operating from there, they will operate at 50% effectiveness.
New option to suppress showing convoy battles on the map.

Changes:

In Air-to-Air combat, the losing side may attempt to break off to avoid destruction.
Air units will now return to their starting air base, when possible. Air units historically returned to their bases except for emergencies, so this is more realistic. They will now only choose another airbase, if their original is not available.
Updated fighter, tactical bomber, and strategic bomber air/sea attack ratings to include approximate impact of aircraft speed and climb rates in combat performance. The old calculation excluded these factors, which made these ratings less accurate. The new estimates are based on the average of the enemy faction's performance at the same tech level, so this rating is still an estimate, and your actual combat may vary, depending on which enemy country you are attacking. But, it should be a better estimate than is currently in the game.
Updated Resource Grid on Production Screen. When you weren't producing enough supply or fuel, the Resource Grid Usage Row would only show what you had available to use, not what you actually needed to fully fuel or supply your troops. The grid now shows what you actually need, even though you weren't able to provide that amount. This will help you better know when you are underproducing fuel or supply. In this case, the tooltip will also say "Need" instead of "Used".