Block games
On Schedule ▸ Schedule: find the game (By lawn, By time or By player, with filters), then drag it to its new slot — or drop it onto another game to swap them. Conflict checks run as you go and Save changes stays blocked until the board is clean; pause the checks if a legal end-state needs an illegal intermediate step, then turn them back on to save.
Worth doing first: Save current as version, so any experiment can be rolled back.
Knockout matches
On Knockout schedule, the Courts & times panel takes a one-off date, time or lawn, and tap two matches to swap their lawns. Round-level changes (a pinned day and time, a start by cap, a different lawn set) belong on the round row instead.
The one rule
Hand edits live until the next Re-generate — which replaces placed games wholesale. Generate first, hand-tune second, and save a version before any regenerate you're not sure about.