Edge orientation (2-look OLL, step 1)

Make a cross on top: three cases (dot, line, L).

What it is

The first look of 2-look OLL orients the last-layer edges so a cross shows on top, without caring about corners. Three algorithms cover every case.

Recognition

Count the top-colour stickers on the top face's edges: none is a dot; two opposite is a line (hold it horizontal); two adjacent is a L (hold it at the back left); all four is a cross.
How to read the diagrams
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Dot
F R U R' U' F' f R U R' U' f'
12 HTM · 2 algs
Line
F R U R' U' F'
6 HTM · 1 alg
L-shape
(U2) f R U R' U' f'
6 HTM · 2 algs
Source: Hand-written. The cases are edge-orientation patterns; each example is SpeedCubeDB's published setup for an OLL case with that edge pattern (OLL 2, 45, 44); the algorithms are the top-voted SpeedCubeDB algorithms for those OLLs, which orient the edges whatever the corners do. Every algorithm shown was checked by the logic engine; rejected ones are listed in docs/db-exclusions.md.