There are some panels in the randomizer that are made significantly easier to perform quickly and reliably with some additional knowledge. In this guide, I'll try to go through most of what I've learned over time.

Tutorial Normal - no real tricks to speak of. Expert - For the parity puzzles (dot tutorial, tutorial vault), there's only a single start point that can work. This start point will be the only one that can not reach another while moving diagonally.

Symmetry Normal, Double - the laser set has a few different good approaches. For normal, I memorize the solution for each panel and then turn around and input it. For double randomizer, I solve the entire orange set, hitting printscreen on each solution as I solve them. I also make sure to have the game screenshot folder open (steamapps/common/The Witness/screenshots) so that I can then reference these solutions without having to tab out of the game. Another strategy is to stand back so that both sides can be seen simultaneously, albeit at a shallow angle. Expert - Glass Factory has a lot of troll puzzles- the 5th one always has 2 hidden dots, and the 8th is always an extremely short line. For the 90 degree symmetry puzzles, it's often better to let the trailing line complete the triangles rather than try to complete them immediately. For fading lines, it's best to try short lines that will definitely determine the symmetry type before solving, and remember the last puzzle has no symmetry. Finally, the laser set is best done with the simultaneous viewing trick, though for the final pair I take it a step further. I take a screenshot of blue 3 and paste it into paint.net, then screenshot orange 3 and paste it into a new layer with 50% opacity. Then I can rotate/transform orange 3 until I have a solvable puzzle, and can input that solution into blue 3.

Desert All - The key to a good Desert is to memorize the full set of possible patterns (a handy cheat sheet can be found here), and become quick at recognizing which pattern it is from a short glance at a reflection. Note that the only solutions that start in the center are on panels that can only start in the center. The best surface approach is to look at the left panel(s) on the way in, then solve the first. Look up, then solve the second, and then the rest of the surface. For the rotatable panel, it's always worth guessing through a center start, and also always worth putting in a single guess after setting it to rotate. The most likely guess is bottom right to bottom left, as that pattern appears twice. For the light room, setting the light to the right is easiest but setting it to the left is fastest for walking time. The pond room is standard with no tricks. The flood room is unique in that you only need to solve the floating panel, but the light turns on after solving the 4th panel in the room. At this point there are 6 patterns left, and it's significantly better to guess the remaining patterns until you get it right than to wait for the water to drain. In the final room, there are 3 options: double latch skip to avoid the randomized panel, solving the panel on the right to tilt the randomized panel up, and the pond peek to solve it without having to tilt it. If you go up to the edge of the pond and look down, then you can see a reflection of the very top of the panel, which at this point is usually enough to determine the full pattern. The worst case scenario of seeing nothing leaves 5 options, but all of these options are fast to draw and you've most likely seen most of these by this point as well. Desert Vault is best approached by trying to fit one shape in first, and then subtracting the rest. On expert, the polyminos are again the best place to start, and I recommend trying to come up with something that mostly works for the more restricted parts of the panel first and then adjusting the line to satisfy the rest of the constraints.

Quarry (to be filled later)

Keep (to be filled later)

Treehouse (to be filled later)

Town (to be filled later)

Swamp (to be filled later)

Mountaintop (to be filled later?)

Mountain Floor 1 (to be filled later)

Mountain Floor 2 (to be filled later)

Mountain Floor 3 (to be filled later)

Under the Mountain (to be filled later)