Tuning materials properties on demand is at the heart of condensed matter science. Electronic transport and magnetism are strongly linked to the overlap of electronic wave functions and can be, thus, manipulated by varying the electronic bandwidth through chemical substitution or physical pressure. However, a controlled tuning of the symmetry and anisotropy of transfer integrals and exchange interactions remained inaccessible so far. Here, we apply unidirectional compression and tension to single crystalline samples to explore systems with strong electronic interactions. In our studies of the unconventional superconductor Sr2RuO4 [1-3] uniaxial strain enabled us to reveal even-parity Cooper pairing, thus ruling out spin-triplet superconductivity after more than two decades of intense studies on this material. In particular the strong increase of Tc upon uniaxial compression goes hand in hand with an enhanced upper critical field, which allowed us to obtain more precise NMR data of the superconducting state that eventually overturned previous highly cited results [4]. Following that, we utilized the recent advancements in strain tuning and applied uniaxial stress to triangular-lattice Mott systems enabling us to tune the metal-insulator transition and unconventional superconductivity with unprecedented precision [5]. This way, we pinpoint the nonmagnetic ground state of one of the hottest quantum-spin-liquid candidates through the slope of its metal-insulator boundary in the temperature-pressure phase diagram [5-7]. Apart from tuning the electronic correlation strength, uniaxial strain is a powerful tool to manipulate frustrated magnetism, which is particularly relevant in quantum-spin-liquid candidates where geometrical frustration suppresses antiferromagnetic order down to very low temperatures TN << J [8] or entirely [5-7]. Here we obtain, for the first time, direct control of antiferromagnetic order within a kagome-lattice single crystal by applying in situ uniaxial strain at cryogenic temperatures [8]. Breaking the symmetry in a controlled manner yields a linear increase of TN by 10% as stress reduces the frustration strength, in line with theoretical predictions for a distorted kagome lattice. Our pioneering endeavors [1-3,5,8] demonstrate uniaxial strain as a powerful tool to tune correlated electrons in situ between insulating, (non)magnetic, metallic and superconducting states – towards stabilizing novel, exotic, possibly even quantum entangled phases. [1] A. Pustogow, Y. Luo, A. Chronister, Y.-S. Su, D.A. Sokolov, F. Jerzembeck, A.P. Mackenzie, C.W. Hicks, N. Kikugawa, S. Raghu, E.D. Bauer, and S.E. Brown, Nature 574, 72–75 (2019) [2] Y. Luo, A. Pustogow, P. Guzman, A. P. Dioguardi, S. M. Thomas, F. Ronning, N. Kikugawa, D.A. Sokolov, F. Jerzembeck, A.P. Mackenzie, C.W. Hicks, E.D. Bauer, I.I. Mazin, and S.E. Brown, Phys. Rev. X 9, 021044 (2019) [3] A. Chronister, M. Zingl, A. Pustogow, Y. Luo, D.A. Sokolov, N. Kikugawa, C.W. Hicks, F. Jerzembeck, J. Mravlje, E.D. Bauer, A.P. Mackenzie, A. Georges, and S.E. Brown, npj Quantum Materials 7, 113 (2022) [4] K. Ishida, H. Mukuda, Y. Kitaoka, K. Asayama,Z. Q. Mao, Y. Mori, and Y. Maeno, Nature 396, 658-660 (1998) [5] A. Pustogow, Y. Kawasugi, H. Sakurakoji, and N. Tajima, Nat. Commun. 14, 1960 (2023) [6] B. Miksch, A. Pustogow, M. Javaheri Rahim, A. A. Bardin, K. Kanoda, J. A. Schlueter, R. Hübner, M. Scheffler, and M. Dressel, Science 372, 276-279 (2021) [7] A. Pustogow, Solids 3, 93–110 (2022). [8] Jierong Wang, Y.-S. Su, M. Spitaler, K.M. Zoch, C. Krellner, P. Puphal, S.E. Brown, and A. Pustogow, Phys. Rev. Lett. 131, 256501 (2023)