Feature Interactions

Shops
Right-click a shop sign: one transaction.
Shift-right-click a shop sign: full-stack transaction when possible.
Left-click the shop chest: view details.
Shift-right-click the chest: cycle display when you own the shop and have permission.
Shulker boxes
Right-click an eligible shulker box in your inventory to open it. Commands and chat are blocked while the virtual container is open, so close it before trying another action.
Poses
/sit
/lay
/layback
/bellyflop
/spin
/crawl
Some poses may depend on permission or location.
Trees, heads, and votes
/treecuter
/tc
/heads
/myhead
/sellhead
/hpc
/vote
/votestreak
Use each base command for live help. Features evolve faster than static documentation; the dangers remain admirably backward-compatible.
Bedrock player? Command syntax is the same, but GUI clicks and inventory interactions can feel different through cross-play. The translation layer has limitations; hostile mobs remain fluent.