Current questions and answers regarding the map editor.

For Juss456. When creating a two-level map, besides pressing M (English) on the keyboard after the map is already created in the editor, or View->Map properties, is it also necessary to check the box next to "two level map" at the beginning in the create new map window? What does "Single Scenario" and "Multiplayer arena" mean at the beginning in the create new map window? What does "show this dialog at startup" mean at the beginning in the create new map window? How do you assign tasks on the map? For example, "hero such and such must survive" or add some of your own нестандартные tasks (for example: recruit 100 peasants)?

1) Yes, it is necessary.
2) Single Scenario - A scenario map, such as any mission in Campaigns or Scenarios. Usually, there is only one human player in it, there is a plot, scripts, etc. Most often, the conditions for the players differ significantly.
Multiplayer Arena - a regular Multiplayer map, an equal map for all players, without scripts (or something like that). Well, and so on, I hope it's clear.
Show this dialog at startup - if you want to remove this stupid window every time you load the editor, then when creating a new map, just uncheck this line.
3) View->Map Properties Tree. A panel will appear on the left. New tasks are created in the Objectives field. This has been described in detail somewhere

Added 2 minutes ago

You can use mod in some expressions.
For example,
n - mod(n, 1)

That's right. Thank you)