Another long-requested feature we've implemented for QGIS 3.10 is a new button in the layout map item properties toolbar, which allows you to directly set a map item to the extent of a spatial bookmark!
This feature was funded by North Road
This feature was developed by Nyall Dawson (North Road)
This application was created by Kartoza (Pty) Ltd. Available on GitHub! Version: 2.3.1