Using QuickScale

Calibrating a drawing with an unknown scale

Open a drawing

In QuickScale, open a drawing.

When you first open a new drawing in QuickScale, a red banner appears at the top of the drawing to tell you that the drawing's scale has not yet been set:

Scale not set notice

This is the first in a "traffic-lights" sequence that takes you through the simple calibration process: red means "not scaled"; amber means "provisionally scaled" and green means "scaled".

Calibration traffic lights

Draw a calibration line

As the scale of the drawing is unknown, we need to set the scale by drawing a calibration line using a known accurate site measurement. If the drawing does not contain any measurements you can use any item for which a measurement is known (e.g. door width, window width, etc.)

Navigate to that part of the drawing where you are going to draw your known measurement (zoom in to get a good clear view of the part of the drawing to be measured) and click the calibration tool button:

Calibration Tool button

Now click one end of the measurement and the move the mouse to the other end and click:

Calibration line

The calibration dialog will now appear:

Calibration Dialog

Enter the exact dimension or just click OK to confirm the measurement. The "traffic light" banner will turn amber to indicate that we now have a provisional scale.

Repeat the "Draw a calibration line" process using another known measurement. The "traffic light" banner should now turn green to indicate that we now have a confirmed scale.

That's it. You should save the calibrated drawing now and you are ready to take-off all the measurements you need or print the drawing to scale.