How set width and height for panes?

[mortymacs]

Hi,

I have a database project that runs "show tables" on the left side and gets queries on the right side, like modern database tools, e.g., DataGrip.
Everything is fine. The only thing I'm looking for is to change the width of the left pane because the list of tables is vertical, and it only needs to get 20% of the screen. Something like this:

+---------+-----------------------------------+
| Tables  | server@postgresql> select * ....  |
| Users   |                                   |
| Tasks   |                                   |
+---------+-----------------------------------+

Do you have any solution to handle this case?

Thanks!