[Table] How to change rows / columns?

[Bizarrus]

I dont find anything to modify tables:

How i can create a Table with two columns, by default it has three.

[davidjgraph]

https://stackoverflow.com/questions/40760274/add-row-to-class-diagram

[davidjgraph]

It's the same thing, select a cell and press ctrl/cmd+D or ctrl/cmd + enter. did you actually try it?

[davidjgraph]

for column, select the table and "arrange" in the right-hand panel, the table operations are there..

[Bizarrus]

No, on the right panel you can only change size/position (and others), but not the columns:

[davidjgraph]

Under "table" there aren't icons to add column?

[Bizarrus]

Yeah, big thanks!
It is hard to find, because it has an bad visual usability. :(

All other Buttons/actions have an border, but only these icons not.

I think, it is better when the style changes from:

to:

like all other buttons/actions.