How to draw low and high frequency boundaries/regions in a Bode plot?

How do I go about drawing regions/boundaries in a magnitude Bode plot? Taking a look at the example plot below, these boundaries should not be enterd and are marked in red. They are found both in the low frequency region and high frequency region. The low frequency region has a slope of -20 dB per decade until it reaches 1 rad/sec. In general how would I be able to translate requirements like this and draw them on a Bode plot?

Answer 1

[Walter Roberson]

if you are calling bode() to do the plotting, then although it is technically possible (if I recall correctly), it is not recommended and might not work properly.

bode() does not create a pair of static plots: it deletes all axes in the current figure and then creates an interactive plot. Arranging for any changes to work out properly with the interactive plot might be a challenge.

I would therefore suggest that instead you use appropriate functions to extract the data needed, and then use it to draw plots along with any additional information you may need.