Using SimVimCockpit you can configure any Arduino pin as a single digital output (such as LED), or as a serial output with a 16-bit register (or LED driver) connected to this pin. This will allow you to add as many annunciators (and other digital signals) as needed for your cockpit.
If your panel has just a few annunciators, you can just connect the LEDs directly to Arduino pins:
Unlike ArdSimX interface, SimVimCockpit supports multiple serial outputs, that is, you can assign as many output pins for this type of output as you need. Every Arduino pin that is assigned as serial output controls 16 LEDs or other digital devices (relays, drivers, etc).
To provide extended digital output you should use LED driver DM13A or other similar IC (you can see the list of such drivers on the "Components" section). This driver is just a register with a latch, that provides 16 constant-current outputs for 16 separate LEDs or LED bars. Also, two 8-bit 74HC595 registers can be used instead, as described on the tech guide pages
As such, you can make several separate modules located in different areas of your cockpit. Each module has 3 input signal lines (besides power lines). You need to connect the "PIN" input to the Arduino pin assigned for extended output. Two other signal inputs - "D" and "L" - should be connected to the corresponding common bus lines ("D" and "L" output signals). More information about digital output use read on the tech guide pages.
In the configurator, select any parameter suitable for digital output (such as annunciator), and assign it to any digital pin or a free extension created beforehand.
Once a LED is assigned to an extension, it will be marked as "Digital Output Extension", and will not be available for inputs. Remember, you should connect the LED driver or register to the pin marked as output extension, not the multiplexer for inputs.
To display some parameter value as a linear or circle graph indicator you can assign it as multiple LEDs in the configurator. For this, you have to select only the output to which the first LED will be connected and then insert the number of LEDs your indicator includes.
All LEDs forming this indicator should be connected to the first specified digital output and all consequent outputs without skip. You can use either separate LEDs arranged in the form you need (circle or linear) or a LED bar graph indicator.
Note: The bar LED display modules with built-in voltage-controlled driver (like LM3914N) can not be configured as simple LED bar in SimVimCockpit - you need to use PWM-controlled output for such displays. Also, the MY9221 driver cannot be used. All you need for such simple indicators for your panel is a sheap shift registers (HC595 or DM13A driver and similar chips)