Enter an onchain address then hit the broom icon in the header to sweep the wallet.
Discussion
I don't want to sweep the whole wallet. I want to consolidate only two UTXO's.
Not supported yet. Alternatively you can import the seed into Sparrow and do it there: https://docs.zeusln.app/for-users/embedded-node/backup-and-recovery/#can-i-recover-my-zeus-onchain-wallet-into-other-wallet-applications