Threshold connectivity matrix

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Dear Marijn,
Its a single subject MEG data.
By significant I mean, if you look at the figure in the following example:
https://martinos.org/mne/stable/auto_examples/connectivity/plot_mne_inverse_label_connectivity.html#sphx-glr-auto-examples-connectivity-plot-mne-inverse-label-connectivity-py
on lower right, it shows a bar that display the strength of those
connections with values 0.4-0.6. When I plot for my data the bar displays
values from 0.15-0.20 and shows the connections below 0.15 also. How can I
restrict it to show only connections above 0.15?