Fixed and selectable lines
Check how many lines are active and whether the wager is per line.
Ways games
Read the required adjacent reels and whether wins evaluate left-to-right or both ways.
Cluster games
Confirm the minimum connected symbol count and adjacency rule.
Match the displayed win
Open the paytable entry and active bet before assuming a combination was missed.
Quick answers
Do all visible matching symbols pay?
No.
Are 243 ways the same as 243 paylines?
No.
Where is the active evaluation rule?
The current game's paytable.