When creating an object in a map using a tool such as **Create
Area**, right in the middle of the process we can edit coordinates
in the **Record**
pane's Coordinates tab. This example shows the step by step
process.

We begin with a new, blank drawing open in a window. As described
in the **Editing
Drawings** topic, we choose **Create
Area** for the mode button in the main toolbar.

We **click** to mark the first vertex
of the area. The **Record**
pane automatically appears, showing the **Values**
tab.

We move the mouse over the **Record**
pane, to click on the **Coordinates**
tab to show the list of coordinates being built. The coordinates
of the first click appear in **blue**
preview color in the first Coordinates list row.

Moving the mouse back over the drawing window we can continue to draw the area. The editing session stays alive even if we move the mouse away from and then back into the drawing window in which we are editing. We can even move the mouse into a different application, like a web browser, do some work in the web browser, and then when we return to Manifold the edit-in-process will be exactly where we left it.

In the drawing window we **click**
the second vertex location and immediately a second row appears in the
Coordinates list.

In the drawing window we **click**
the third location, to add a third vertex and a third row of coordinates.

Suppose that although we are not yet finished with creating the area,
we would like to alter the position of the second vertex, to use more
even numbers for the coordinates. We can **double-click**
into the X coordinate box and change the value, pressing **Enter**
when done.

Likewise, to enter a more even number for the Y coordinate we can **double-click** into the Y coordinate
box and change the value, pressing **Enter**
when done.

We can move the locations of vertices in a more visible way by changing
X and Y coordinate values. If we **double-click**
into the X cell for the first vertex, and we enter the same X value
as in the next row, the two vertices will both have the same X values
and thus line up vertically.

As soon as we press **Enter** to
finish editing the vertex moves to line up with the vertex above it. While
we are at it, we will **double-click**
into the Y cell for that vertex and edit the long coordinate to an even
value.

Suppose now we would like to align the third vertex to the same horizontal
location as the second vertex. We **double-click**
into the Y cell for that vertex and enter the same Y value as the preceding
vertex.

As soon as we press **Enter** to
finish editing the vertex moves up to the same horizontal, Y level as
the preceding vertex. We will edit the X cell for the third
vertex as well.

The result is a precise, right angled triangle where all the coordinates for vertices are simple integers.

We are still in **Create Area** mode,
so we an add a fourth vertex to create a rectangle, if we like. We
could do that by clicking a fourth time into the map at the approximate
location for the fourth vertex, and then we could use the Coordinates
pane to even up the coordinates of the fourth vertex to form a precise
rectangle.

Or, if we like, we can specify the location of the next vertex by entering values directly into the Coordinates list, if we prefer that to clicking with the mouse in the drawing window.

We **double-click** into one of
the coordinate boxes in the new coordinate row marked by an *****
asterisk in the row handle.

We enter the same Y value as for the first vertex, so the fourth vertex will be on the same horizontal level.

When adding a new coordinate row if we enter just one of the coordinates
and press **Enter**, the system will
auto-complete the second coordinate by copying the corresponding value
from the immediately preceding coordinate row. This is a convenient
way of adding coordinates that align vertically or horizontally. In
this case, when we enter a Y value for the new vertex...

...as soon as we press **Enter**,
the system will auto-complete the new coordinate row by coping the X value
from the preceding coordinate row. If we do not like that
we can, of course, **double-click**
into the X cell and change the value to whatever we want. Press
**Add Record** to create
the area.

We can see that a new, rectangular area object has been created in the
drawing. To confirm the coordinates of the vertices are as we created
them, we can **Shift-Alt-click** the
area.

That launches the Coordinates tab of the Record pane to display the coordinates. Note that the very last coordinate of an area is the same as the first coordinate, automatically added when the area was created to close the area boundary that defines the area object.

**Example:
Layers Tutorial** - We take a tour of the Layers pane in the
**Contents
pane**, learning how to manage layer display order, select layers,
turn several layers on and off at the same time, alter opacity settings
for one or more layers and how to change background color.

**Example:
Edit Attributes and Move a Point** - We look at the attributes
for a point in a **drawing**
layer and edit one of the attributes using a more expanded **Edit**
dialog. We then move the point to a new location. Easy!

**Example:
Edit Attributes, Larger Text, IME for Asian Languages** - A tour
showing how to edit attributes in a drawing using the **Record** pane **Values**
tab and the expanded **Edit **dialog,
including advanced Unicode facilities and use of the built in Input Method
Editor (IME) to input text in Japanese language.

**Example:
Edit Covered Objects** - Working with drawings where some areas
completely cover smaller areas is a bad idea, but sometimes we have to
work with data in that form whether we like it or not. This
topic shows techniques that can help us select and edit objects that are
completely hidden by higher objects.