Not directly, it want a relative change.

But, you can get the desired result by just typing in the new size divided by the old size on the command line, as in, just type the actual calculation, no spaces. So if the old size is 3.7 units and you want it to be 2 units, when it asks for scale factor, just type

2/3.7

on the command line when it asks for the scale factor.

You do need to know the old size though, which can be found using the distance tool in the info menu.

This is commonly used when inserting an existing map to trace by for example, just insert the image, measure the distance of the scale bar in the inserted image, and use that as the basis for scaling.

What is created initially depends on what tools you use. If you use the basic tools (path, poly, etc) in the right-hand toolbars, they only create a single entity, either a line or a polygon, depending on the tool (Of course, if you draw using a polygon tool, but has line width greater than 0, it will appear as a hollow shape with an outline, looking more like a line than a poly, but it is still a polygon)

If you draw something using one of the drawing tools (usually accessed from the buttons in the top right, or the symbol catalog window) it may or may not draw two entities, depends completely on the tool. Some only draw a wall, some only draw a floor, and some draw both.

If you use the dungeon room/corridor tool, it will always make two entities, wall and floor.

In the cases where the tool created two entities, these are separate, and needs to be edited separately.

You can usually easily identify if something is one or two entities by using the List command from the Info menu. If it goes straight form 0 selected entities to 2 selected entities when you click on the edge, you know you are dealing with overlapping entities (probably a floor and a wall), and the info you get when executing the command should give the details on the entities.

When you use break on a polygon, it turns into a path (a line), which means it is no longer a polygon, and obviously therefore have no surface area to fill anymore, which is why the fill disappears.

Use the trim tools, such as :CC2BREAK: to create breaks in lines. Combine it with the various modifiers, such as :CC2MODINT: to start/stop breaks exactly where the lines meet with the line from the other room.

You can then combine the line segments into one path using tools such as Combine Paths if you need to. (If you need to depends on how you are going to use them. Just having individual paths that just meet up in the exact same point is often enough.)

The reason you couldn't find them is because they don't have CA51 in the file name. If you look in Sue's screenshot above, you'll see that the 'Dunes CA51' fill references a bitmap called 'Dunes.png'

That's why you can find them using that dialog, but you need to do so from a map in the appropriate style. From there you can find their names, and then in the map you want them in, you can then easily add them once you have learned that filename.

Not much. Mainly a new short chapter describing the Symbols along, fill with symbols, and symbols in area.