Roam

No — you must place markers in the same direction the card is facing and you may not rotate placement patterns. (p.6–7)

Skip that square while placing and continue with the remaining markers; you may not reclaim or remove markers normally until the card they occupy is completed. (p.6) Note: an artifact ability can replace another player's marker when used. (p.16)

Yes — a blank marker shown on a character card may extend beyond the map edge, but normal marker patterns must fit entirely within the map borders. (p.8–9)

Yes — you may pay 2 coins per blank shown on the card to place that blank (you can do this for each blank on the card) and you may use coins you gain during the same turn. (p.9)

When all six squares of a land card are filled, the player with the most markers on that card claims it; tied players may each bid once (starting with the active player) to win the card, and only the winning bidder pays their bid. Also, any other player who had at least one marker on a claimed card gains one coin. (p.10–11)

By the standard rules each square may hold only one marker, but the stacking variant allows up to two markers per square; the Outpost variant awards 3 points to the first player who completely surrounds an opponent's marker on all eight adjacent squares. (p.6; p.14)