What everyone says about just looking toward your target and moving the cursor till it hits 950-1000 ly. mark. Zoom out to go faster, pay attention to the grid lines to have a notion of how far you can go before you have to zoom back in.
Oh, and no extra fuel tanks. If you take the biggest fuel scoop you can fit (no mass penalty) and fit a fuel tank half the size of the stock one, you just saved a chunk of mass that will give you longer jumps. Your destination is always on the far side of the star you just jumped to when you're doing a long, straight-line course, so fly close to the horizon of the star and pick up what fuel you can on the way past. No need to slow down, stop, do anything clever, just take a swoop-and-gulp around every scoopable star and make a second pass if you go through a non-scoopable.
And, when you're a couple of hundred light years out, stop and turn off everything non-essential. Reduces your basic heat load, so you can jump sooner after you're done scooping. Saves a modest amount of fuel into the bargain, not that that's a major concern.