14) To change the swing direction of a door:
* Select the door.
* Click the flip arrows that appear.

15) On the Basics design bar, click Windows.

16) On the options bar, select M_Fixed 0915 x 1220 mm.

17) Position some windows on the exterior walls, as shown in the image, by
clicking the exterior walls.

18) Right-click anywhere in the drawing
window. Click Cancel. Repeat this again to exit the command.
In the next section you add a floor to the project.

Sketch Mode Introduction
Before you start drawing the floor, read this overview of Sketch mode.
A wall is a linear element and can be defined by two points in the drawing
window.

When you add floors you use Sketch mode to draw linework that defines the edges of the floor slab.

The design bar changes to the Sketch design bar with tools to help you draw the series of 2D sketch lines. When you end
Sketch mode, the linework you have drawn is converted to the building component and the design bar returns to its normal state.

You use Sketch mode for many things in Revit Architecture.

When creating floors, roofs, railings, stairs, solids, and voids, you use Sketch mode to establish the geometry of the building
component.

to select all the connected walls or lines.
(note the tab key is just pressed and released, not held down like the shift and ctrl keys)

Cancel two times.

The horizontal arrows mirror the door
along the wall it is positioned on. Both
vertical and horizontal arrow symbols
appear in doors, windows, furniture
components, and in all families that can
be mirrored or reversed without changing their geometry or function.

Windows and doors are tagged
automatically if Tag on Placement is
selected on the options bar. To avoid
automatic tagging, clear the option.

The tags that appear when placing the
components are set on the Settings
menu: Annotations > Loaded Tags.

Doors and windows have
discrete geometry, and this geometry
is stored in the family definitions either
within the project or outside the project
as RFA files that you load as needed.

Some building components such as floors and roofs cannot be stored with predetermined geometry. For these elements, you draw lines to establish the base geometry. Revit Architecture then uses these lines as the base geometry to create the building component. When you pick a tool from the design bar that depends on a series of sketch lines, the tool starts Sketch mode. While you are in Sketch mode, you draw a series of 2D lines.

Tip :

Tab to Select Chain of Walls or Lines
To select all the exterior walls or a connected chain of lines in Revit Architecture, you can use the “Hover- TAB-click” method. This method
enables you to select the connected (or chained) set of walls with one click rather than clicking each wall separately.

Add a Floor>>

Sketch mode lines have a few simple
rules:
* Sketch lines must not overlap.
* Sketch lines must usually form a
continous shape without breaks or
gaps in the linework.
* Sketch lines must not form T
intersections.
Each of the different building components that you create with
Sketch mode varies slightly in its
requirements for its Sketch mode
linework.

You can draw the desired shape of
your object (floor in this case) using the
Lines tool, but often it is much faster
and easier to accept the default
proposed mode.
The Pick Walls function automatically
recognizes the boundary of the
connected walls and generates a
closed loop of lines that represent the
shape of the floor.