plot customisation

[Ollipolli1909]

Hi James,
Happy New Year, and sorry for being a pain, again...
I made some progress and most things are working now, i managed to get everything running in 'command line' as well. One thing I haven't been able to work out it some customisations of plots. The app allows e.g. manipulating the arc heights etc. How would I do the same when calling PlotSashimi. ATM I am doing this:

plotSashimi(
gene,
show = c("coverage", "junction", "junctionLabels"), # leave in what you like
coord_method = c("none"),
fill_scheme = "sample_id"
junc_color = alpha2col("black", 0.8),
junc_fill = alpha2col("black", 0.9),
junc_alpha = 0.5,
junc_accuracy = 1
)

Is there a way to add arc parameters here?
Many thanks,
Oliver