Documentation: install, update and setup WP Team Display plugin
Documentation: insert a chart in editors and select a theme
Documentation: add, edit person and organize the flow chart
Documentation: insert a chart in Editor and themes overview
Yes it is, most of the time it depends on the theme you're using, not the plugins.
If your flow chart is too large (width) and some person are going on the line bellow they should be, you can click the checkbox: "disable the responsive mode"
Then a zoom feature will be enabled.