Once you have opened a map, you can start to shape and modify it. You can do the following actions with your mouse:
If your mouse has less than three buttons, you can simulate the missing
buttons by holding <shift> or <ctrl>:
right-click = "click & <shift>" and middle-click = "click & <ctrl>".
To select an object, left click on it. You can do so either on the map window or in the map-archetype panel window to the right. If you want to select a group of squares on the map (e.g. for copy/paste actions), left click and drag. You will notice a rectangular area getting highlighted as you drag.
To insert a new object, you must first select one of the arches from the default-archetype panel to the left. Right click to insert the selected arch into the map. You can also right-click into the map-archetype panel in order to insert the object at a specific place in a pile of objects. You can drag the mouse on the map view in order to insert the same arch on many squares.
To delete an object, simply middle click on it. You can drag the
mouse to delete multiple objects. Deleting specific objects out of a stack
is possible by middle-clicking in the map-archetype panel.
(If your mouse has no middle-button you can simulate it by pressing <Ctrl>+<any
mouse button>.)
There is a convenience function for inserting walls into a map: The "auto
joining"-feature. Activate the checkbox in the menu "Map->Auto-Joining"
to enable it. Whenever you insert or delete a wall now, any walls of the
same type will automatically join to form a continuous solid wall. This
saves you the hassle of switching between all the different wall-arches.
If using any arch set other than the standard one, you might need to
customize the file "autojoin.txt" in order to have the autojoining feature
work for all the available wall-styles.