Operations like add and delete columns

I just setup cloudbeaver with a mysql database in docker.
Everythings working, I can connect and view and edit my data.

My question is, how can I edit columns?
How can I export several tables? (like a database dump)

Like in the picture above I can select several columns (same for tables on scheme level), but how can I actually do things like adding new columns, deleting new columns, exporting the data etc.? Seems like doing something with the selected items is not implemented yet, or I am just too dumb to find out how to do something with it.