What can you do in main phase 1 and can you do all of it?

In Main Phase 1 of a turn in a trading card game like Yu-Gi-Oh!, players can summon monsters, set spell or trap cards, and activate card effects. Players can also change the battle positions of their monsters and conduct other strategic actions related to their cards. However, certain actions may be limited by the game rules or the specific card effects, so not all actions may be possible in every situation. Overall, Main Phase 1 offers a range of options for players to enhance their position on the field.