Check the scale

Let's check that the drawing was drawn in real scale.

Tip: It is often enough to insert a linear light fixture and compare it to a door, for example. If the linear light fixture is bigger than the whole house, the drawing is likely 50 or 100 times too small. You should then scale it according to the following instructions.

Do the following:

Select Tools tab > Utilities group > Calculate menu > Calculate distance.
Turn the End snap on by pressing Shift down, right-clicking and selecting End to lock the cursor to the end points of lines.
In the drawing, find a distance whose correct length you know. This distance can be the width of a door frame or a window or the distance between two walls of a room.
Indicate the start point of the distance.
Indicate the end point of the distance. The program shows you the distance in millimeters on the command line.
Check if the length is the same as the selected distance. If the length is what you expected, the drawing is in the correct scale.

If the length is larger or smaller than expected, scale the drawing to the correct scale as follows:

Select Home tab > Modify group > Scale > Scale drawing.
Indicate the start point of a distance whose correct length you know.
Indicate the end point of the distance. The program shows you the distance on the command line.
Enter the correct length in millimeters on the command line.
Press Enter. The program scales the drawing according to the distance you entered.