xfconf-query set an array value to a property

"Xfconf-query is a Command Line Interface (CLI) tool for accessing configuration data stored in Xfconf."

If a property is an array of values:

xfconf-query -c CHANNEL -p PROPERTY [-n] -t TYPE1 -s VALUE1 -t TYPE2 -s VALUE2 ...

References

Xfconf-query

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