how to change the visualization

[Kreijstal]

for example in verilog, in some examples there are audio buttons, in others there is a screen with keyboard control, and in other there is just a waveform viewer, is there a toggle between these options or are they hardcoded on the example?

[sehugg]

The visualization depends on what signals are output by the top module, if hsync/vsync/rgb signals are present there will be a simulated CRT, otherwise you'll see the waveform view only. You can also pull up the waveform view from the bottom of the screen underneath the CRT, seeing both.

More here: https://8bitworkshop.com/docs/platforms/verilog/index.html

[Kreijstal]

very good