Ok so tried to find this online im not seeing anything maybe im blind. Ok so u make a nether portal anywhere in the overworld. light it up then go through it having access to your mouse through escape key or t should work. in the brief time of loading the nether, when it says loading terrain, exit the game by the red x at the top of your screen. load the game back up again and if done coorectly u will be in the nether no where near the spawn in portal to the nether instead u will be at the exact corridinates in the nether as u were in the overworld. Now make sure u carried obsidian with u, make a new portal alllowing it to spawn u iin the overworld. and u can do this over and over again as long as u have obsidian for new portals in the nether. Meaning u can travel 10s of thousands of blocks each time. this is also reversable. Please let me know if im being clear. thanks