If you are flying in VR, you can "pop out" the AviTab into a window via the standard X-Plane Plugin menu if the in-cockbit version is difficult to reach.
To enable in the ISCS (Integrated Smart Control System) for X-Plane aircraft like those from iniBuilds or FlyJSim , you typically need to toggle the option within the aircraft's custom on-screen menu or settings tablet. How to Enable AviTab in ISCS please enable avitab in iscs
Extract the downloaded folder and move it to: X-Plane (11 or 12)/Resources/plugins/ . If you are flying in VR, you can
Load your Toliss aircraft (e.g., Toliss A319). Once the cockpit is loaded: If you are flying in VR