Flight Crew Instrument; Flight Crew Commercial; Flight Crew Multiengine
Flight Crew Last 90 Days 10; Flight Crew Total 1075; Flight Crew Type 395
Training / Qualification; Human-Machine Interface; Confusion
Airspace Violation All Types
Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Human Factors
On a VFR departure from the ZZZ Airport Runway XXL; the floor of the ZZZ1 Bravo Airspace (X;000 ft) immediately east of ZZZ was inadvertently and briefly entered without ATC consent. The airspace infringement was instantaneously recognized by the pilots; as well as the ZZZ Tower controller; and corrective action taken immediately. The altitude encroachment was 300 ft into the airspace and total duration was only seconds.   Contributing factors:Hand flying high performance aircraft to regain proficiency associated with the impact of COVID-19 and lack of currency.Confusion over the altitude of the floor of the Class B Airspace in part because it was not depicted on the Garmin G3X Touch avionics system's Map Display page at the scale selected.  Toggling to the VFR Sectional Display showed the airspace floor altitude.
[Narrative contained no additional information.]
Pilot reported an airspace incursion occurred right after departing a nearby airport.