I've made new table in SLX and now want to create form with my table in the BaseTable option. But  option is readonly.

Do you know any way to change it?

Can't do.

You have to create a new Form, with the Correct Base Table.

Now, after you create the new Form, you could Copy and Paste the existing Controls onto the new Form and then change the Bindings as needed.

I can create only forms for standart tables via architect. But we have several forms for custom tables(this forms created by other developer). I can't understand how to create new Form with my table

On the Forms Submenu, there are entries for the standard OOB tables, but there should be 2 entries at the bottom:

  Data Form

  Manage Form

  Data Form allows you then to choose any table as the Base table for the Form.

  Manage Form allows you to create a Form that is not bound to any table.

I do not know if there are any Licensing Restrictions that would prevent this options from being available, but that is possible.

Thanks!