Level Builder

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More detail: Asset count and toolbars not up-to-date as of version 1.9.0

A level being edited in the level builder.

The Level Builder is one of the main features of Mega Man Maker. Using the Level Builder, a user can create their own levels, save them as .MMLV level files, and share them with others. Players are also able to collaborate together over the internet in real time to build levels together using the Build Online feature of the Level Builder. Levels can be shared either by sending .MMLV files to others or by using the Online features to upload a level to Mega Man Maker's online server (after a play test to verify it is possible to complete) and shared with others.

Assets

The assets included in the Level Builder as of 1.8.0 include the following:
4 Playable Characters
60 Bosses
229 Enemies
166 Level Objects
16 Pickups
724 Backgrounds
787 Tilesets
210 Ladders
233 Spikes
37 Waters
8 Lavas
9 Special Objects
100 Weapons (including each character's Buster)
16 Utility Weapons (including each character's exclusive utility weapons)
183 stage Music tracks (official games, 8-bit recreations, and original remixes)
1000 Screens of building space (50 horizontal screens by 20 vertical screens)

Editor Toolbars

The Level Builder contains three different toolbars, each with different sets of tools and features.

Top Toolbar

This toolbar is focused on assets that can be placed within a created level.

Icon	Tool	Description
	Weapons	Button brings user to menu where they can select the usable weapons within the created level.
	Music	Button brings user to menu where they can select the music that will play within the created level, and listen to previews of each level music.
	Backgrounds	Button brings user to menu where they can select the backgrounds used for specific screens within the created level.
	Tilesets	Button brings user to menu where they can select the tiles to place within the created level.
	Characters	Button brings user to menu where they can select the starting spawn point and starting character for the created level.
	Enemies	Button brings user to menu where they can select enemies to place within the created level.
	Level Objects	Button brings user to menu where they can select level objects to place within the created level.
	Pickups	Button brings user to menu where they can select pickups and pickup spawners to place within the created level.
	Bosses	Button brings user to menu where they can select bosses, boss associated assets, and level ending assets to place within the created level.

These both appear in each of the assets menus associated to the Top Toolbar.

Recents: Shows a listing of the last ten assets selected by the user.
Favorites: Shows a listing of the ten or less favorite assets selected by the user. They can be added, removed, or re-arranged as the user desires.

Bottom Toolbar

This toolbar contains other useful tools unrelated to placing assets.

Icon	Tool	Description
	Music (Simplified)	Button brings the user to a simplified version the Music menu, with only buttons for play/pause, next song, and previous song.
	Quick Tools	Button allows the user to choose between four drawing and selection methods: either draw freely, select a group of assets, fill in a group of solid tiles or fill in an outline with tiles. Holding right click with the fill in tools deletes assets instead.
	Test Play	Button allows user to test play their created level. Complete the level, exit the level, or press P or Esc to return to the Level Builder.
	Grid Toggle	Button toggles the ability or inability to see the tile grid in the Level Builder.
	Find Spawn Point	Button moves to the screen where the player's spawn point is placed, if one exists in the created level. If a spawn point does not exist within the created level, pressing the button will do nothing.
	Move Screen	Button toggles the ability or inability to move between screens by holding the left mouse button in, and dragging the mouse across the screen. Assets cannot be placed while this feature is in use.
	Map Toggle	Button toggles the ability or inability to see a map of all 1000 screens in the Level Builder.
	User Interface Toggle	Button toggles the ability or inability to see the various buttons and toolbars associated to the Level Builder. When the feature is disabled, moving the mouse to the far top or far bottom of the screen will cause the associated toolbars to re-appear until the mouse is moved away.
	Clock	States the current time, as set by the user's time settings on their computer.

Orange Button Toolbar

Contains all other tools that don't fit into the two prior two toolbars.

Icon	Tool	Description
	Button Shortcuts	Button gives the user a listing of all button combination shortcuts associated to the level builder.
	Change UI Color	Change the color palette of the Level Builder's user interface.
	Change Editor Music	Change or mute the "Level Editor" music.
	Exit	Exit the Level Builder. Will give a warning before asking if they would like to proceed.
	Load Level	Select and load a saved .MMLV level file into the Level Builder.
	Save Level	Save the the currently built level as a .MMLV level file. A level cannot be saved if it does not have a name set in the Level Settings.
	Level Settings	Name the currently built level, as well as set Player Abilities and Charge Type.
	Build Online	Host or join an online Level Builder room by either a server lobby or direct IP connection.

These are the sub-categories in Level Settings in greater detail:

Level Name: A textbox that allows the user to type in their level's name. There is a limit of 66 characters for level names and some text characters cannot be used to prevent conflicts with file and system names.
Player Abilities: Allows the user to select what character abilities are enabled or disabled in the created level. These abilities are listed below:

Player Ability	Player Character	Enabled by default?
Sliding	Mega Man	Yes
Charge Shots	Mega Man	Yes
Double Damage	Proto Man	No
Proto Strike	Proto Man	No
Double Jump	Bass	No
Dodge Roll	Roll	Yes
Charge Broom	Roll	Yes

Charge Type: If the Charge Shot is enabled for Mega Man, the user can select one of three types:
- MM4 Charge Shot
- MM5 Charge Shot
- MM6 Charge Shot (chosen by default)

Button Shortcuts

Shortcut	Tool	Description	Added in version
ESC	Exit	Exit the Level Builder. A warning appears asking if the user would like to exit.	1.0.0
CTRL + S	Save Level	Allows user to save the the currently built level as a .MMLV level file. A level cannot be saved if it does not have a name set in the Level Settings.	1.0.4
CTRL + O	Load Level	Allows user to select a previously saved .MMLV level file, and load it into the Level Builder.	1.1.0
H to toggle on/off. Hold CTRL to temporarily enable.	Move Screen	Allows the ability or inability to move between screens by holding the left mouse button in, and dragging the mouse across the screen. Assets cannot be placed while this feature is in use.
P	Test Play	Allows user to test play their created level. Complete the level, exit the level, or press P or ESC to return to the Level Builder.
G	Grid Toggle	Toggles the ability or inability to see the tile grid in the Level Builder.
C	Find Spawn Point	Moves to the screen where the player's spawn point is placed, if one exists in the created level. If a spawn point does not exist within the created level, using the shortcut will do nothing.
M	Map Toggle	Toggles the ability or inability to see a map of all 1000 screens in the Level Builder.
U	User Interface Toggle	Toggles the ability or inability to see the various buttons and toolbars associated to the Level Builder. When the feature is disabled, moving the mouse to the far top or far bottom of the screen will cause the associated toolbars to re-appear until the mouse is moved away.
1	Weapons	Brings user to menu where they can select the usable weapons within the created level.
2	Music	Brings user to menu where they can select the music that will play within the created level, and listen to previews of each level music
3	Backgrounds	Highlights Backgrounds in the Top Toolbar, and sets asset to the last selected background
4	Tilesets	Highlights Tiles in the Top Toolbar, and sets asset to the last selected tiles
5	Characters	Highlights Characters in the Top Toolbar, and sets asset to the last selected player spawn point
6	Enemies	Highlight Enemies in the Top Toolbar, and sets asset to the last selected enemy
7	Level Objects	Highlights Level Objects in the Top Toolbar, and sets asset to last selected level object
8	Pickups	Highlights Pickups in the Top Toolbar, and sets asset to last selected pickup
9	Bosses	Highlights Bosses in the Top Toolbar, and sets asset to last selected boss
E	Draw	Freely draw and place assets. Selecting an asset using the Eyedropper Tool defaults to the Draw mode.	1.8.0
R	Select	Select a group of assets placed down. Other than bosses, selected assets can be cut, copied, or pasted using CTRL + X, CTRL + C, or CTRL + V respectively.
T	Solid Fill	Fill a rectangle of the currently selected asset. This only works with tiles, level objects and enemies. A maximum of two full screens or a rectangle comprising 448 1x1 tiles can be filled at a time.
Y	Outline Fill	Fill a rectangular outline of the currently selected asset. This only works with tiles, level objects and enemies. An outline of a maximum of 444 1x1 tiles can be filled at a time.

These tools are exclusive to button shortcuts:

Shortcut	Tool	Description	Added in version
Hold SHIFT + UP / DOWN / LEFT / RIGHT / W / A / S / D	Fast Map Movement	Move through the Level Builder map quickly	1.0.0
Hold TAB	Favorites Selection Wheel	Access the Favorites assets list. The Favorites asset list cannot be edited from the Favorites Selection Wheel.	1.5.0
Hold SHIFT + TAB	Recents Selection Wheel	Access the Recents asset list.	1.6.0
Hold SHIFT + ALT + left click	Eyedropper Tool	Change the currently selected asset to that of clicked asset. This however will not copy the asset's options.	1.7.0
Hold ALT + left click OR middle click	Eyedropper Tool	Change the currently selected asset to that of clicked asset. From 1.7.0 onwards, this will also copy the asset's options.	1.0.5.3
Fill in tool + hold right click	Deletion Fill-in Tool	Turns the fill-in tool red that will delete the rectangular box or outline of selected assets	1.8.0

Layering

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The contents of this article may change as the update approaches and more information is revealed. Do not add information unless it has been publicly revealed in the announcement channels or by a reliable source (i.e. the developers). Refer to the guidelines about upcoming content when contributing to this page.

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Reason: Unknown

Layering is a feature added in version 1.9.0 that allows assets to be placed and appear on different layers in the Level Builder.

Backgrounds have two layers: front and back. Backgrounds with transparency can be placed on either layer while non-transparent backgrounds can only be placed on the back layer.

Shadow and water each have their own layer that appear in front of backgrounds. All other assets are assigned to one of five layers: far back, close back, main elements, close front, far front.

.MMLV File Format

Glitchy side-effects of improperly text editing a .MMLV file such as having a wide playable character.

.MMLV is the file format used to store data about a Mega Man Maker level.

These files can be edited with text editing programs such as Notepad. Editing the text in these files can change various aspects of the level, including removing limitations on what text characters can and cannot be used in a level's name, how long level names can be, and even how various assets in the level function.

Playing text edited level files may in some instances cause crashing, glitches, or other oddities to occur that otherwise would not. This could be caused by the player text editing certain values assigned to assets in ways they are not normally intended to be used.

To access .MMLV files saved in-game, they are located in %localappdata%/MegaMaker/Levels on a computer with a Windows operating system. The files may be in another location for computers running Windows through software such as Wine on other operating systems.

Trivia

This article contains information from an unknown source.
While this information may be true, its validity needs to be confirmed. You can help by locating the origin of this info and linking the source next to the relevant text as a reference.
Reason: "Luigi has stated that menus have a bit of empty space around them so users can click out of them."

Luigi has stated that menus have a bit of empty space around them so users can click out of them.^{[source needed]}
When a level has been named and saved at least once, the Level Builder will periodically attempt to autosave the level in case something goes wrong, such as crashes, softlocks, or the game being suddenly closing. This may cause the game to lag while editing large levels.
Placing the cursor over an icon in the Quick Tools menu will change the color of the icon, cycling through all of the UI colors except white.