[Gretl-users] delete variables

Dear Gretl Community, In the hope that my question is not too silly: Is there a specific command to keep a subset of variables and discard the rest? I have large number of variables in my data set, but I only need a small subset of them. I find that using the "delete" command works, but inefficiently: it would be much easier just so save/keep/maintain/... the small number of variables I am interested in. In other words, is there a complementary command to "delete"? Thanks in advance, Cruz