When establishing in the pattern after canceling IFR, what squawk should be set?

When establishing in the pattern after canceling IFR, the correct squawk code to set is 4301. This specific code is typically assigned to VFR traffic operating in the vicinity of an airport that may be engaged in pattern work. It's important for visual flight rules (VFR) traffic to use the appropriate squawk codes to enhance situational awareness and facilitate communication with Air Traffic Control (ATC).

Setting squawk 4301 allows ATC to effectively identify and track VFR aircraft, helping to maintain safety in the busy airspace around the airport. In contrast, other squawk codes such as 1200, 1300, or 1500 are commonly used for standard VFR operations or other specific purposes but do not serve the purpose of indicating an aircraft in the traffic pattern as effectively as 4301 does.