As soon as custom geo bookmarks are configured in a WebOffice 10 R3 project, a new tool button "Bookmarks" appears in the upper toolbar of the WebOffice mobile client. It replaces the "Full Extent" button which now is one available bookmark in the down drop list/the new tab.

Upper toolbar in WebOffice mobile client (tablet mode) with opened list of geo bookmarks

Geo bookmarks in WebOffice mobile client (phone mode) will open a new tab
Note: For detailed information about the configuration of geo bookmarks, please see chapter Geo Bookmark.