Right-clicking on the empty graph, generator or generator output (circle) will open up a Right-click Menu. With this menu a new generator could be created, exported, removed, previewed, etc.
Create will add a new generator node. Note that all of the generators are grouped by type:
Map Generators connect only with other map generators. Their inputs and outputs are always Maps.
Object Generators connect only with other object generators. They may or may not have map inputs/outputs, but the Object is always present.
Output Generators directly set terrains and place objects.
The Portal is not actually a generator but a connection technique. Don’t let the name fool you - it is not about spatial holes to other terrains or dimensions, it’s just a way to better organize the graph better. The portal creates a ‘wireless’ connection when set as an input, that can be paired with a matching output portal that feeds into another place on your graph, minimizing the amount of long cluttered wires displayed.
With the help of the Group several generators node could be grouped together to quickly move or delete them. Group can be used to annotate some generator blocks too. To engroup the generator simply drag it into the group (so that it does not sticks out).
Biome generator contains the biome data with it's own output generators.
Legacy generators list contains all of the generators that were used in previous versions of MapMagic. Creating new ones is not recommended, but in some cases it could be handy to make something compatible with already existing graphs.
Export will store the generator (group) in an XML-like .nodes file so it could be imported with an Import feature. It will export a single generator if clicked on a generator, a group with all the contained generators if clicked on group, or all of the generators if clicked on the empty field.
Import will import exported generators, appending them to currently existing graph.
Duplicate will create a copy of the generator or a group just below. This feature is disabled if clicked on empty field.
Update will replace a legacy generator with a relevant one, trying to copy all the parameters and connections.
Using Update can break your graph, make sure you have backup before using it.
Remove will delete the generator or a group. This feature is disabled if clicked on empty field. If clicked on group it will ask if you want to delete all of the contained generators with a popup window.
Reset will reset all of the generator values, returning them to the default ones. Note that this will un-link this generator from the graph.
Any output from any map generator can be viewed using the Preview feature.
On Terrain will color the terrain in a red to green range of colors according to the preview map values. High map values are colored green, while low values are red.
Moreover, a map can be previewed in a separate window. In Window will open up a window with a grayscale map displayed. This map can be scrolled and zoomed the way the main graph can.
To exit preview mode, right-click anywhere in the Editor and select Clear.
Note that Preview works only with a generator output, not the generator itself, since the generator could have several outputs. Make sure you are clicking an output circle, not the node window when trying to use a preview.